What ideology is opposed by a british political party which stems from a branch of the men's liberation movement of the early 1970s?
Justice for Men and Boys: Justice for Men and Boys (and the Women Who Love Them) (J4MB) is a British political party which identifies with the Men's rights movement and opposes feminism. Men's rights movement:  It branched off from the men's liberation movement in the early 1970s.
feminism