This article presents Jean-Paul Sartre’s concept of the tension between existence and politics and the role of political commitment in existentialist philosophy. Based on Sartre’s concept of engagement, the article analyzes the transition from the personal to the political perceived as a movement from personal moral consciousness to the awareness of the importance of the individual as a social actor and citizen in society. Sartre’s concept of political engagement can be characterized as critical intellectual commitment and “Socratic Citizenship.” Accordingly, this article is also an acknowledgment of the two important philosophers of ecoethica, Tomonbu Imamichi and Peter Kemp, both committed public intellectuals who said that the role of the philosopher is to contribute to the public affair of cosmopolitan society. Thus, the article presents the political engagement in four major parts: (1) From the existential to political engagement, (2) Political commitment as a struggle for human freedom, (3) The Socratic Citizenship, and (4). Conditions of authentic political action. Political engagement represents an effort to realize the respect owed to each individual as a universal singular, as well as that owed to freedom and democracy in the Kingdom of Ends.