Oh Runeterra...
The more lore I read, the more I realize Runeterra is one of the worst fictional realms one could possibly live in. People would have to fuck like rabbits from age 2 to keep the world populated with the kind of death rates they must see. At least they have the tech to rebuild cities instantaneously. And Heimer, while a prodigy, is nothing compared to the sum total of all Runeterra has accomplished despite its insane death rate.