Prof. Kruk’s article in the Special Issue of the Journal of Divorce and Remarriage first details and then destroys the three waves of arguments against shared parenting. At first, opponents simply denigrated fathers as uninterested in their children and only proponents of shared care because they wanted to reduce their child support obligations. The problem with both was that subsequent research demonstrated that neither was true. In fact, fathers most highly valued their relationships with their children, refuting the radical feminist narrative.
After those efforts failed, Kruk explains, opposition got serious, i.e. it attempted to recruit science to its anti-dad cause. (Let me be clear that it was precisely anti-father. Essentially everyone at the time understood that, overwhelmingly, mothers got sole or primary custody of children post-divorce. Therefore, any attempt at sharing care was perceived as reducing mothers’ time with their children and increasing father’s.)