The cause of this was the vilification of motherhood by society. Girls needed to be "strong independent women" and the concept of women being a kind and nurturing homemaker was seen as old fashioned, even though these skills are absolutely essential to raising a well grounded, sensible self actuated and well adjusted child. The fabric of our society depends on it and somehow this was allowed to happen.
Woa, woa. Wait a second- why is the mother the one that has to stay home and raise the child with her "kind and nurturing" homemaking skills? Why can't the dad stay home with the kids and leave the mom be the "strong independent" woman she wants to be?
Society vilifies motherhood? Then all the dads who want to put the borked society back together again can take up the mantle of the caring parent. Be my guests, eh.