In the 1950s, divorce was considered scandalous. In those days, people who could no longer make marriage work were routinely shunned and excluded.
Comparing schedules. Designating holidays. Shuffling your kids from one house to the other. Sharing custody of your kids is no easy feat, how are you supposed to work with an ex that you don't see eye-to-eye with? The good news is, ex-spouse's successfully co-parent all the time. The bad news is, now it's your turn to make it work.