This original study examines women's activism against war in areas as far apart as Sierra Leone, India, Colombia and Palestine. It shows women on different sides of conflicts in the former Yugoslavia and Israel addressing racism and refusing enmity and describes international networks of women opposing US and Western European militarism and the so-called 'war on terror'. These movements, though diverse, are generating an antimilitarist feminism that challenges how war and militarism are understood, both in academic studies and the mainstream anti-war movement. Gender, particularly the form taken by masculinity in a violent sex/gender system, is inseparably linked to economic and ethno-national factors in the perpetuation of war.