on which pro-feminists usually campaign include violence against women, sexism, inequalities in pay and promotion at work, sex trafficking, and women's rights to birth control. Pro-feminist men who support anti-pornography feminists also campaign against pornography. They generally believe that: women suffer inequalities and injustices in society, while men receive various forms of power and privilege. the current, dominant model of manhood or masculinity is oppressive to women, as well as limiting for men themselves. Pro-feminists believe that men must take responsibility for their own behaviours and attitudes and work to change those of men in general. both personal and social change are vital. Just as there is substantial diversity and disagreement within feminism, there is diversity among pro-feminist men. For example, the extent to which men are also limited or harmed by societal gender relations is an area of disagreement. Some men emphasise the privilege received by virtue of being men in a patriarchal or male-dominated society, while others emphasise the ways in which the gender roles laid down by patriarchal society constrict both men and women. Some pro-feminist men argue that those who emphasize the latter, or who even claim that, like women, men too are "oppressed", are not really pro-feminist or are not pro-feminist enough. Others make a distinction between "radical pro-feminist" and "liberal pro-feminist" men, and emphasize their shared commitments and similarities. Pro-feminist men typically also recognise the importance of other forms of injustice and other kinds of social relations. Pro-feminists assume that class, race, sexuality, age and other such things are important influences on the relations between and among men and women. Pro-feminist men who are politically active have tended to concentrate on a number of specific issues, such as men's violence. Early writings and assumptions Early writings in the U.S. that the pro-feminist men's movement has identified as antecedents to its thought include Jon Snodgrass's A Book of Readings for Men against Sexism, Michael Kimmel and Michael Messner's collection of essays, Men's Lives, and Joseph Pleck's The Myth of Masculinity. Three basic assumptions of these early texts included the distinction between sex and gender, the treatment of gender as a social construct, and the position that men are harmed by proscriptive gender roles. Building on this last assumption, early pro-feminist men's texts assumed a corollary that if men were made aware of these conditions, they would relinquish their social privileges. Compared to feminism Some feminists