There is a crossover point somewhere on the income/QoL scale where children go from utility to liability. It's incredible recently, and still only in some coun

There is a crossover point somewhere on the income/QoL scale where children go from utility to liability. It's incredible recently, and still only in some countries, where children are in the liability area. By and large for all human history, children where a utility. More or less free labor to help support the family.