Borderlands and Migration: The History of Movement Between Mexico and the United States

• Introduction
• Chapter 1
• Chapter 2 <Railroads, Ranches, and Early Labor Flows>
• Chapter 3 <Revolution, Displacement, and the Making of Migrant Routes>
• Chapter 4
• Chapter 5 <Depression, Repatriation, and the Politics of Removal>
• Chapter 6 <War, Labor Shortages, and the Bracero System>
• Chapter 7
• Chapter 8
• Chapter 9 <Labor Organizing, Workplace Struggles, and Transnational Solidarity>
• Chapter 10 <Industrial Borders: Maquiladoras, Cross-Border Production, and New Work Regimes>
• Chapter 11 <Trade, Integration, and the Economic Reordering of the 1990s>
• Chapter 12
• Chapter 13 <Policy Debates, Reform Efforts, and the Politics of Legalization>
• Chapter 14
• Chapter 15 <Enforcement Regimes: Detention, Deportation, and Due Process>
• Chapter 16 <Asylum, Protection Claims, and Humanitarian Responses>
• Chapter 17 <Gender, Family, and the Everyday Lives of Migrants>
• Chapter 18 <Race, Citizenship, and the Construction of Otherness>
• Chapter 19 <Remittances, Investment, and Transnational Development>
• Chapter 20 <Border Cities: Urban Life, Culture, and Hybrid Identities>
• Chapter 21 <Violence, Organized Crime, and Their Impact on Migration>
• Chapter 22 <Environment, Climate Stress, and New Drivers of Movement>
• Chapter 23 <Pandemic, Public Health, and the Reconfiguration of Mobility>
• Chapter 24 <Technology, Surveillance, and the Datafication of Borders>
• Chapter 25 <Toward Shared Futures: Policy Pathways, Rights, and Transnational Solidarity>

This book examines the long, entangled history of movement between Mexico and the United States and argues that migration across this border has been — and remains — simultaneously an economic system, a set of social ties, and a site of political contestation. By tracing cycles of labor demand, state agreements, and family networks from the nineteenth century through the present, Borderlands and Migration situates individual journeys within broader structures that shaped opportunity and constraint on both sides of the border. Rather than treating migration as a series of isolated events, the book reads it as a durable process that reconfigures economies, remakes communities, and produces shifting categories of belonging and exclusion.

The analysis is transnational in method and scope. Chapters draw on government records, newspapers, oral histories, union archives, corporate documents, and remittance and demographic data to follow people, capital, and policy across the boundary line. This approach foregrounds how decisions made in one polity — whether a labor recruitment agreement, a customs policy, or a law tightening interior enforcement — have ripple effects across the borderland. It also centers the agency of migrants themselves: how families organize circular circuits of work and care, how workers build institutions and claim rights, and how migrants imagine home in more than one place. Taken together, these sources reveal patterns that repeat and transform across time: periods of expanded mobility tied to labor demand, punctuated by moments of restriction and removal shaped by politics and crisis.

Two core arguments guide the book. First, migration between Mexico and the United States has been shaped less by a single, linear movement toward permanent settlement than by ongoing cycles of labor circulation and family strategies calibrated to economic opportunity. From nineteenth-century railroad crews to twentieth-century agricultural rotation systems, from maquiladora employment to twentieth- and twenty-first-century service-sector labor, workers and employers have continually renegotiated the thresholds of mobility. Second, state policies — whether formal agreements like guest-worker programs or the incremental expansion of border enforcement capabilities — have often attempted to manage these cycles without addressing their structural drivers. The result is a border regime that alternates between pragmatic cooperation and securitized confrontation, producing unintended consequences for communities on both sides.

The chapters that follow are arranged roughly chronologically but grouped around recurring themes: labor systems and recruitment; the institutional development of border and immigration control; the social networks that sustain migration; the roles of gender, family, and identity; and the ways economic integration and insecurity produce new forms of mobility. Early chapters recover the nineteenth- and early-twentieth-century roots of cross-border labor flows and the emergence of border institutions. Mid-century chapters analyze wartime recruitment, guest-worker programs, and large-scale repatriations. Later chapters examine the impacts of economic liberalization, the rise of unauthorized migration, and the dramatic intensification of enforcement and surveillance since the 1990s. The final chapters address contemporary shocks — public-health crises, environmental stress, and technological change — and ask how policy might better protect rights while recognizing deep mutual interdependence.

Beyond scholarly description, this book aims to illuminate the policy choices that have produced present conditions and to suggest directions for more humane, effective governance. Understanding the historical rhythms of demand and displacement shows why piecemeal enforcement often fails and why reforms that do not reckon with labor markets, remittance economies, and family ties will have limited impact. Equally important, a historical perspective reveals longstanding forms of cross-border solidarity — unions, church networks, legal advocates, and community organizations — that can be the basis for alternative approaches grounded in rights, accountability, and shared development.

Borderlands and Migration is written for scholars and students of history, migration studies, and public policy, as well as for readers from border communities and practitioners seeking historical context for contemporary debates. Wherever possible the narrative centers lived experience alongside institutional analysis: the letters, remittances, testimonies, and everyday practices through which people sustained livelihoods and kin across borders. By placing those lives at the center, the book offers a view of the border not as a single line of closure but as a set of connected spaces where economies meet, cultures mix, and politics are continually remade.

The land that would become the U.S.-Mexico border was, for centuries, a fluid and contested space, a vast expanse traversed by indigenous peoples, Spanish explorers, and later, Mexican and American settlers. It was a place of encounter, trade, and conflict long before the abstract lines of nation-states were etched onto maps. To understand the complex relationship between Mexico and the United States, and the enduring patterns of migration that define it, we must first journey back to these foundational movements, when the very concept of a fixed border was a distant dream, or perhaps a nightmare, depending on one's perspective.

In the early nineteenth century, the region was characterized by overlapping claims and a vibrant, often volatile, mix of cultures. Indigenous nations like the Comanche, Apache, and Navajo commanded vast territories, their seasonal movements and trade networks defying European notions of static boundaries. Spanish colonial ambitions, though far-reaching, often struggled to impose central authority over these distant northern frontiers. Settlements were sparse, isolated outposts connected by tenuous trails, rather than well-patrolled highways. This was a world where the horizon, not a line on a map, often dictated the limits of one’s known world.

Mexico’s independence from Spain in 1821 dramatically reshaped the political landscape but did little to immediately alter the lived experience of the borderlands. The vast northern territories, stretching from present-day California to Texas, remained sparsely populated by Mexican citizens and largely unintegrated into the new nation's core. The fledgling Mexican government, grappling with internal instability and a vast inherited debt, found it challenging to exert effective control or encourage significant settlement in these distant reaches. This relative emptiness, from a national perspective, would prove to be an irresistible vacuum for its ambitious northern neighbor.

Meanwhile, the United States, fueled by an ideology of Manifest Destiny, looked westward with covetous eyes. The idea that it was America’s divine right to expand across the continent, from sea to shining sea, was a powerful motivator, shaping both public opinion and government policy. This expansionist fervor wasn't merely about land; it was about resources, trade routes, and a burgeoning sense of national identity. The concept of "frontier" in the American imagination was less a boundary and more a temporary stopping point before the next push further west.

The first significant flashpoint came in Texas. American settlers, initially invited by the Mexican government to populate the region, quickly outnumbered Mexican residents and chafed under Mexican rule, particularly over issues like slavery and centralist governance. This influx of Anglo-American colonists, often bringing with them enslaved people despite Mexico’s abolitionist stance, set the stage for inevitable friction. It was a demographic shift that profoundly altered the character of the region and laid the groundwork for future conflicts.

The Texas Revolution, beginning in 1835, was a direct consequence of these tensions. After a brief but bloody struggle, Texas declared independence from Mexico in 1836. For Mexico, this was an act of rebellion, a usurpation of its sovereign territory. For the Texans, it was a fight for liberty and self-determination. The aftermath left a contested border, with Mexico refusing to recognize Texan independence and claiming the Nueces River as the legitimate boundary, while Texas asserted its claim to the Rio Grande. This disagreement over a river would become a crucial casus belli years later.

For nearly a decade, Texas existed as an independent republic, a geopolitical anomaly caught between two larger powers. During this period, migration continued, both from the United States into Texas and, to a lesser extent, from Mexico. The allure of cheap land and economic opportunity drew a steady stream of newcomers, further solidifying the Anglo-American presence and deepening the cultural divide. The republic's very existence, however, was precarious, dependent on its ability to ward off Mexican attempts at reconquest and to forge alliances with other nations.

The annexation of Texas by the United States in 1845 was the spark that ignited the Mexican-American War. Mexico viewed annexation as an act of aggression, a blatant disregard for its territorial integrity and a violation of its national sovereignty. The unresolved border dispute – the United States inheriting Texas’s claim to the Rio Grande – provided President James K. Polk with a convenient pretext for military action. Polk, a staunch expansionist, was eager to acquire California and the southwestern territories, seeing them as vital to America's continental aspirations.

The Mexican-American War, fought from 1846 to 1848, was a profoundly transformative event for both nations. From the American perspective, it was a swift and decisive victory, a testament to national strength and the fulfillment of Manifest Destiny. From the Mexican perspective, it was a humiliating defeat, a catastrophic loss of territory that forever reshaped its national identity and its relationship with its northern neighbor. The conflict was uneven, with a technologically superior and better-organized American military eventually overwhelming Mexican forces.

The Treaty of Guadalupe Hidalgo, signed in February 1848, formally ended the war. This treaty was a watershed moment, literally drawing the modern border between the two nations. Mexico ceded vast territories, including present-day California, Nevada, Utah, Arizona, New Mexico, and parts of Colorado, Wyoming, Kansas, and Oklahoma, in exchange for $15 million. This amounted to more than half of Mexico's pre-war territory. The sheer scale of the land transfer was unprecedented, fundamentally altering the geographic and demographic realities of North America.

Article VIII of the treaty addressed the rights of Mexicans residing in the ceded territories. It stipulated that they could choose to retain Mexican citizenship and move south of the new border, or become U.S. citizens. Those who remained would have their property, religion, and cultural rights protected. This provision, however, often proved to be more aspirational than actual. Many Mexicans suddenly found themselves foreigners in their own land, subject to new laws, a new language, and often, systemic discrimination. The "border" had arrived, not as a gradual transition, but as a sharp, imposed line.

The immediate aftermath of the treaty saw significant shifts in population. Some Mexicans, unwilling to live under American rule, indeed migrated south, though their numbers were relatively small compared to those who stayed. For those who remained, the transition was often harsh. Land grants, previously recognized by Mexico and Spain, were frequently challenged or invalidated by the new American legal system, leading to widespread dispossession. The introduction of English as the official language and American legal customs further marginalized the Spanish-speaking population.

The Gadsden Purchase of 1853 further solidified the border, with the United States acquiring a strip of land in what is now southern Arizona and New Mexico for $10 million. This acquisition was primarily driven by the desire to build a transcontinental railroad route, highlighting the economic motivations that continued to shape border expansion. By the mid-1850s, the current U.S.-Mexico border, stretching approximately 2,000 miles from the Pacific Ocean to the Gulf of Mexico, was largely established on paper.

Yet, even with a defined border, the reality on the ground remained complex. For many indigenous groups, the new international boundary was an artificial construct that sliced through ancestral lands and traditional migration routes. Their movements continued, largely unconcerned with the lines drawn by distant politicians. For Mexican and American settlers living near the new demarcation, daily life often involved crossing back and forth for trade, family visits, and work, blurring the strict legal definitions of nationality. The border, initially a line of conquest, gradually evolved into a zone of interaction.

The late nineteenth century witnessed the nascent stages of organized labor migration, particularly in response to the burgeoning economic development in the American Southwest. The construction of railroads, the expansion of mining operations, and the growth of commercial agriculture created a significant demand for cheap labor. Mexican workers, often displaced by economic changes in their own country or drawn by the promise of wages, began to cross the border in increasing numbers, laying the groundwork for the extensive labor flows that would define the twentieth century.

These early movements were largely unregulated, a relatively free flow of people responding to economic pull factors in the U.S. and push factors in Mexico. There were no elaborate border patrol agencies, no widespread documentation requirements, and certainly no massive walls. The border was porous, defined more by natural features like rivers and mountains than by human-made infrastructure. The informal nature of these crossings allowed for a degree of fluidity and adaptability, as individuals and families moved seasonally or in response to specific labor opportunities.

The experiences of these early migrants were diverse. Some found steady work and relative prosperity, sending remittances back to their families in Mexico, thus strengthening cross-border economic ties. Others faced harsh working conditions, discrimination, and exploitation. The very act of crossing, though less fraught with official scrutiny than it would later become, still involved considerable hardship and risk, from navigating arid landscapes to encountering hostile individuals. Yet, the promise of a better life, or simply a livelihood, often outweighed these dangers.

The political dynamics within Mexico also played a significant role in these early migration patterns. The long reign of Porfirio Díaz, from 1876 to 1911, brought a period of relative stability and economic modernization, but also growing social inequality. The concentration of land ownership and the rise of a capitalist agricultural system displaced many rural Mexicans, creating a surplus labor force eager to seek opportunities elsewhere. This internal pressure to migrate dovetailed neatly with the labor demands north of the border.

On the American side, the acquisition of vast new territories brought both opportunity and challenges. The integration of these lands into the national economy required immense labor, and Mexican workers, with their proximity and often their existing agricultural skills, became a readily available and cost-effective solution. This reliance on Mexican labor was not yet a formalized policy but rather an organic response to economic imperatives, driven by the needs of industries hungry for willing hands.

The foundations of a shared borderland identity also began to form during this period. Communities along the border, regardless of which side of the line they fell on, often shared cultural practices, linguistic traditions, and kinship networks. Families might have members living on both sides, making the border a personal and lived reality rather than just a geopolitical abstraction. This interwoven social fabric would prove remarkably resilient, enduring through subsequent periods of increased enforcement and political tension.

Even as the lines on the map hardened, the human experience of the border remained fluid. The nineteenth century, therefore, laid the essential groundwork for the patterns of migration that would evolve over the next hundred years. It established the territorial boundaries, the economic pulls and pushes, and the initial demographic flows that would come to define the relationship between Mexico and the United States. It was a period when the border transformed from a vaguely defined frontier into a structured, albeit still porous, international divide, setting the stage for the more regulated, yet enduring, movements of the future. The echoes of conquest and the beginnings of a cross-border labor system would resonate for generations to come, shaping lives and policies in ways that are still evident today.