Since the 2016 presidential election, interest in socialism has hit an all-time high in the United States. As social movements seek to focus on intersectionality and the interactions between many societal issues, environmental causes are increasingly viewed through political and socioeconomic lenses. I review the relationship between socialist movements and environmental issues throughout history, then turn to the present day and look specifically at the policies, stances, and activist and organizing strategies of the Democratic Socialists of America with regard to environmental causes, with particular emphasis on their Climate and Environmental Justice Working Group. Finally, I address the broader implications of the growing eco-socialism movement for other political and environmental activists.