From the thesis: "Irregular migration has reached unprecedented levels at the southwest border of the United States, presenting significant challenges for government resources. This thesis analyzes the underlying factors driving these heightened irregular migration flows, focusing on the minimal efforts of South and Central American countries and their ineffective migration policies. Using qualitative research, this study involved reviewing available literature and conducting interviews with two subject-matter experts in migration through Mexico. Findings from the research highlight that South and Central American nations have taken insufficient action to address irregular migration, that these governments are vulnerable to dynamics that spur this phenomenon, and that the U.S. immigration system is susceptible to exploitation. These findings underscore the need to hold South and Central American countries accountable in managing irregular migration, as demonstrated by Mexico's efforts. Furthermore, it emphasizes that the United States must address vulnerabilities within its own immigration system and implement reforms to effectively deter and respond to irregular migration flows. By highlighting the causes influencing irregular migration, this thesis offers valuable insights and recommendations for policymakers, urging both regional cooperation and domestic reforms to address the challenges posed by irregular migration and promote a more sustainable, secure immigration system."