Most feminists seek equality for men and women and therefore believe that biological differences do not matter. This was the aim of all feminists up to the 1960s and these feminists campaigned for equality in work, education and politics. Difference feminists (some, not all, radical feminists) argue that men and women are fundamentally different, they value the differences and celebrate women's unique characteristics. They argue that 'equality' feminists suggest that women should adopt male characteristics and therefore deny their own natures. This then alienates women. Some difference feminists go further and argue that female values are superior male ones. Political lesbianism and separation feminists take this further and advocate for a separate society from men, to enable them to reconnect with female values. Difference feminism is controversial amongst feminists as it argued that they undermine the progress that the women's movement has made.