Well, you see, one of the first freedoms is the freedom to be fruitful and multiply. Anyone talk of population control is inherently antithetical to one of the most basic and fundamental freedoms that human beings possess.
The freedom to be fruitful and multiply is one of the first to go when population densities increae.
Family branches in the old country had relatively small families on average. It was due to not marrying, late marriages, few pregnancies, and a lot of infant and childhood death. One branch had a lot of clerics, and they had large families. Apparently government enforced tithing gave them access to more resources.
Once the ancestors arrived in America, the families got very large on average until the last half of the 20th Century.