The feminist movement destroyed the family. Women were convinced that marriage was dumb and they should give it away for free in order to be "free" and men got used to getting it for free. However, when they let go of the responsibility that comes with marriage and children they lost many legal rights. That fathers were so successfully disassociated from their children in the womb and could not assert their right to stop an abortion was a major victory for those who would destroy the family.
It's still not free just by not marrying the women if you still have to pay child support for children she might have outside of marriage.