This paper draws on material, mostly from outside psychology, which illustrates the deep rootedness of militarisation in modern culture and the numerous ways in which it permeates civic society. Children, boys especially, learn to value armed conflict. War games are now more realistic, and the distinction between gaming and military training has become blurred. War and deadly weapons are portrayed in unrealistic ways that hide their actual effects. Just war theory, widely subscribed to, justifies armed conflict by proposing that under certain conditions, war can be just with moral rules that apply to the fighting. Many psychologists have worked for the military in one way or another, implicitly or explicitly promoting militarism, and the changing nature of war and armaments is providing further temptations for psychologists to do so. Psychology has been ambivalent about militarism. Peace psychology has not taken an unambiguous position on it, often speaking disparagingly of the absence of war in the absence of social justice, referring to it as “negative peace.” Feminists, often very clear in their opposition to militarism, have sometimes advocated for women to have greater acceptance in the armed forces. The paper concludes by arguing for a more clearly identified Psychology Against Militarism. Community psychology should take a lead in advocating for Psychology Against Militarism because militarism is a good example of how the exercise of power, wreaking widespread harm on us all but especially on those who are already relatively powerless, is collectively legitimised, and hence how we become complicit in supporting it.