Climate change has recently emerged as a major factor informing people’s decision to migrate and has increased the urgency of traditional reasons behind migration such as economic hardship, political turmoil, repression, and unjust social conditions. Indeed, given the increasing gravity of climate change, every single individual could become a migrant and every single country could be a source of migration. Regarding the management of migration, which impacts more and more places, a more equitable sharing of responsibility would not only protect the rights of migrants but also create a fair system for all nations. This study addresses climate change along with the more traditional reasons behind migratory movements. It tackles the role of externalization policies, which are expected to gain further momentum due to the growing diversity of push factors, on migratory movements. It also analyzes the functions and implementation of border control, repatriation agreements, and other legal arrangements intended to make it harder for migrants to access international protection.