There have been, maybe always will be, misguided efforts to use government to shape morality. From 1920 to 1933 was the alcohol prohibition. Since then we have had an enthusiastic “War on Drugs”. Both of those moral crusades were failures. They were not enforceable.
During Prohibition, in New York there were 7,000 arrests and only 17 convictions. Across the country by 1927 there were thought to be 30,000 illegal “speakeasies”, twice as many as licensed bars before prohibition. The cost of enforcement was first budgeted at five million dollars but became 500 million. Alcohol consumption did not fall.
The War on Drugs has not decreased drug use. I read recently a most beautiful expression about efforts to use government to shape morality:
A law cannot be justified merely because we like its message. It can only be justified if it produces a result consistent with its message. F
The prohibitions of alcohol and drugs did not deliver less of either. They were passed because people liked their moral messages.
The number of illegal abortions in countries where they are not legal is estimated by 1.) comparing birth rates before and after abortion prohibitions and 2.) comparing birth rates in similar countries which allow legal abortions with those which do not. The number of women in hospitals with complications is plotted and doctors interviewed.
There are three Latin American countries and Ireland where abortions are illegal. When abortions were made illegal the births per 1000 women should have risen. They did not.
The number of abortions do not fall when abortion is made illegal. Experience has show that, like drugs and alcohol, laws against abortions are not enforceable and do not deliver what religious people claim they will deliver.
F Her Body Our Laws; On the Fronts Line of the Abortion Was, From El Salvador to Oklahoma by Michelle Oberman, 2018, Beacon Press, Boston.