Mexican president Vicente Ramón Guerrero issued a decree abolishing slavery throughout the Mexican Republic, with an exception for the Isthmus of Tehuantepec. For Texas, then a department of the state of Coahuila y Texas, the decree directly confronted an institution that had become increasingly important to Anglo-American colonization. Many immigrants entering eastern Texas from the United States came from slaveholding states and brought enslaved people with them. Guerrero’s order therefore exposed a basic conflict between Mexico’s developing antislavery policies and the agricultural system that many Anglo settlers sought to establish in Texas.
Slavery had occupied an uncertain legal position in Mexican Texas throughout the 1820s. Mexico’s Federal Constitution of 1824 did not explicitly settle the issue. The Coahuila y Texas Constitution of 1827 prohibited the further introduction of enslaved people and declared that children subsequently born to enslaved parents would be free. Anglo colonists resisted these restrictions. State legislation subsequently permitted labor arrangements based on contracts and indentures, mechanisms that settlers used to maintain control over enslaved workers despite Mexico’s restrictions. Stephen F. Austin and other colonization advocates repeatedly sought legal accommodations because they considered enslaved labor important to cotton production and immigration from the southern United States.
Guerrero’s decree was unequivocal in principle. It declared slavery abolished and persons previously regarded as slaves free, while providing for possible compensation to owners when national finances permitted. An original 1829 broadside preserved in the Britton Hispanic Texana Collection at Sam Houston State University documents the decree and its September 15 date. The measure reflected a longer Mexican antislavery tradition extending through the independence movement, when leaders including Miguel Hidalgo and José María Morelos had condemned slavery and racial hierarchy. In Texas, however, implementation quickly encountered political resistance.
The decree reached Texas on October 16, 1829. Ramón Músquiz, political chief of the Department of Texas at San Antonio de Béxar, did not immediately publish it. Músquiz believed enforcement would conflict with protections previously extended to colonists and feared serious disruption within the settlements. His correspondence shows that Mexican officials in Texas recognized the consequences that immediate emancipation could have for slaveholders and public order. On October 25, Músquiz wrote Governor José María Viesca requesting that Texas receive an exemption. He explained that he had delayed publication while the matter could be reconsidered by higher authorities.
Anglo settlers also pressed for relief. Their response demonstrated how firmly slavery had become connected to economic expectations in the colonies, especially in the fertile regions of eastern and southeastern Texas where cotton agriculture was expanding. Mexican authorities ultimately accommodated these concerns. On December 2, 1829, Agustín Viesca, secretary of relations, informed Texas authorities that the status of enslaved people in Texas would not be changed. The Guerrero Decree consequently was never implemented there. Texas thus received an effective exemption from a national emancipation measure that theoretically threatened the continued legal existence of slavery.
The exemption did not resolve the broader dispute. In 1830, the Mexican government adopted the Law of April 6, which restricted further immigration from the United States and specifically prohibited the introduction of additional enslaved people from that country, although those already in Texas remained enslaved. Mexican officials were increasingly concerned about the rapid growth of Anglo-American settlement and the province’s economic attachment to the United States. Slavery therefore became intertwined with wider disputes over immigration, colonization policy, federal authority, and Texas’s relationship with Mexico.
The historical importance of the Guerrero Decree in Texas lies partly in what did not happen: immediate emancipation was prevented through political intervention. Yet the controversy revealed an enduring divergence between Mexican antislavery policy and the slaveholding interests of a growing portion of the Anglo-Texan population. Slavery alone did not produce the Texas Revolution, but it remained an important underlying issue. By 1836 approximately 5,000 enslaved people lived in Texas. After independence, the Republic of Texas constitution explicitly protected slavery and imposed severe legal restrictions on free Black people. The contrast with Guerrero’s 1829 decree demonstrates how sharply the legal direction of Texas changed between Mexican rule and independence.
References / More Knowledge:
Blake, Robert Bruce. “Guerrero Decree.” Handbook of Texas Online. Texas State Historical Association. https://www.tshaonline.org/handbook/entries/guerrero-decree
Campbell, Randolph B. “Slavery.” Handbook of Texas Online. Texas State Historical Association. https://www.tshaonline.org/handbook/entries/slavery
“Mexican Texas.” Handbook of Texas Online. Texas State Historical Association. https://www.tshaonline.org/handbook/entries/mexican-texas
“Decree Abolishing Slavery in Mexico in 1829.” Britton Hispanic Texana Collection, Newton Gresham Library, Sam Houston State University. https://digital.library.shsu.edu/digital/collection/p243coll3/id/2243
“Ramón Músquiz on Mexico’s 1829 Ban on Slavery.” Digital History. University of Houston. https://www.digitalhistory.uh.edu/disp_textbook.cfm?psid=3656&smtID=3
Barker, Eugene C. The Life of Stephen F. Austin, Founder of Texas, 1793–1836. University of Texas Press. https://utpress.utexas.edu/9780292792111/