This book studies American science fiction films depicting invasions of the USA and Earth by extra- terrestrials within the context of imperialism from 1950–2020. It shows how such films imagine America and its allies as objects of colonial control. This trope enables filmmakers to explore the ethics of American interventionism abroad either by defending the status quo or by questioning interventionism. The study shows how these films comment on American domestic hegemonic practices regarding racial or gender hierarchies, as well as hegemonic practices abroad. Beginning with the Cold War consensus in the 1950s, the study shows how hegemony at home and abroad promotes division in the culture.