The result of that was that a powerful fighter could have a lot of children. Having more than ten was already them being chaste. Dozens of children were seen as just right. In fact, there were eccentric people who had more than one hundred children running around.
It had to be noted that there was no difference between legitimate children and illegitimate children in those families.
After all, the marriage system from Earth was destroyed during the short apocalypse. Normal people lacked strength, so they still needed the marriage system to help each other.
But the peerless fighters who could destroy a building with a punch went through a bloody path that was ravaged by zombies and monsters, so the marriage laws from Earth could not restrain them at all.
Half a century after the transmigration, the peerless fighters and their children as well as their grandchildren formed a pyramid consisting of three generations.