And wet rice is ecologically neutral. The same ground can continue to produce wet rice forever. It does not lose nutrients. Other methods require crop rotation or other ways to keep a field fertile. The trouble or perhaps additional benefit of wet rice is that it requires a division of labor.
People have to work together and depend on each other.
Theoretically this sort of thing results in a government of some sort. And that is why they suspect that wet rice growing coincided with a great surge in Bali culture. As we rolled up Monkey Forest Rd. We ignored them all and walked into a losmen called the Frog Pond, where nobody was around. So we did.