The root cause is it need 30 years to establish a self-sustaining life. The average first birth of Japanese women are reaching to almost 30 years old Most Japa

The root cause is it need 30 years to establish a self-sustaining life. The average first birth of Japanese women are reaching to almost 30 years old Most Japanese are expected to graduate high school(18 years), more than half of them get a degree(22 years minimum). Then you start working for many years. The issue is clear. If we make our life self-sustaining in late teen, problem will be solved. I have an idea that works but nobody(including myself) appreciate it. Spread certain religions like Christianity or Islam. Significantly reduce University students. Significantly reduce high school students, especially female students. Abandon modern health care so significant percentage of people die before reaching 15 years old.(It may sounds like counter-intuitive, but this situation motivate human to give more birth) It has serious moral issue as well as political and economical issues. We somehow manage to keep the political stability and food supply under this condition. I think it's more reasonable we wait for the natural selection that evolve the human to give a healthy first birth in their 50s.