Younger people are already spurning a lot of careers that aren't "fulfilling". We absolutely could handle a huge increase in human population, if we did the fo

Younger people are already spurning a lot of careers that aren't "fulfilling". We absolutely could handle a huge increase in human population, if we did the following: - institute Universal Basic Income - massively increased the density in cities and built more housing in them (i.e. more skyscrapers, and link them together better so cities are more 3-dimensional) - greatly improve local transportation using PRT (personal rapid transit) like SkyTran for less-dense areas and more-expensive service and better mass-transit systems for the highest-density areas - improving long-distance transportation with Hyperloop, high-speed rail (maglev), maybe vactrains later, etc. - more efficient farming, such as the "vertical farming" techniques being explored now - more automation of farming and other industrial production (which feeds back into making UBI work) - cleaner energy sources, mainly better utilization of solar energy with increased PV and maybe orbital solar collectors - asteroid/moon mining and maybe moving dirty industries offworld (with energy being clean and renewable, I'm thinking that metal refining will probably be the last really dirty industry, and with more metal mining offworld, it'd make more sense to do the refining there too)