Much the same applies to the early Indian civilisations like that of Mohenjo Daru.

For her doctoral thesis, Elke Rogersdotter studied a 4,000-year-old city called Mohenjo-Daro in the Indus Valley, in what is now Pakistan.

Found at one city was an enormous well-built bath, which may have been a public bath. The world's first urban sanitation systems were found in Harappa and Mohenjo-Daro.