What role do men have in the work of challenging gender inequalities and building gender justice? This chapter examines the experiences of men as deliberate agents of a feminist masculinity politics, exploring key challenges in men’s efforts to take up profeminism. This first challenge is overcoming one’s own sexist and violence-supportive attitudes and behaviours. Men may be disinterested in or resistant to efforts to involve them in progressive change because of widespread sexist and violence-supportive attitudes and relations.