Feminism and Masculinism

You'll have to excuse the picture, but for whatever reason right clicking wouldn't work so I had to print screen it. I decided to look at the words "feminism" and "masculinism". As you would expect, in the early 20th Century "feminism" appears and suddenly explodes with the increase of new-wave feminists in the 1970s. Oddly, though "masculinism" stays at a fairly even level until the 1990s when there is a small clime. I can only assume this is a reaction to the success of women in liberating themselves.