The spiritual energy in the Barbarian Lands is dense, and spiritual materials frequently emerge from the ground. Many types of spiritual materials are similar and never run out. Although the lands are vast, the population is not very large. For example, the Mothman Tribe, the largest tribe in the Barbarian Lands, has only hundreds of thousands of people. On the outside, in the Central Plains Continent, any large Domain City would have this population.
Back in the day, the main reason why the major races couldn't compete with the Human Race is because they have a strong ability to reproduce. Each race has its own divine skills and extraordinary physiques. Even without cultivation, their fighting capabilities are not weak, but few races can reproduce quickly.
