[codechapin]

I think this is not giving enough thought on the topic of population growth. I believe in most rich/advanced countries population is declining, unless they have a lot of immigration, United States for example. Hans Rosling has some studies on this, his studies say that the world population won’t exceed 11 billion.

Also, people are having less sex than before. https://www.theatlantic.com/magazine/archive/2018/12/the-sex... which obviously is going to affect population growth.

Although, this could change if somehow we manage to live considerably longer lives. Then population would grow again. Which is the main promise of Scythe by Neal Shusterman.

We would need a very good reason to spend the resources to go colonize other planets.