At the edge of the Yasuni Forest of Amazonia, the Anangu Kichwa have a community center with a school and meeting area. They don't live here; the Kichwa like waterfront property and have their homes streched along the Napo river, which feeds the Amazon. They have no running water, no electricity and no sewage system, but they do have a line of western style flush toilets.
This is odd; in the first world, dependable water supplies came first, then the toilet evolved to take advantage of the water supply, and then the sewer was invented to cope with the explosion in contaminated water. Water flush toilets were a response to available infrastructure and there is no chicken/egg question; infrastructure came before toilets.
Credit: Lloyd Alter