Romans in finer homes had running water and private baths. The rest of Roman society was gifted with public baths in order to, uh, lower the overall fragrance of urban areas. Public urinals were built and operated by the fullers, because urine was (is?) used to process wool. The cloaca maxima, the great sewer system under Rome, still exists in spots, but ultimately moved the human wastes into the Tiber River, so imagine that on a summer day...
There was a thread awhile back on the “greatest inventions”. It was way deep into the comments - but some Freeper said his grandmother told him “running water”.
I think the Romans would agree. And I imagine without running water, many of the folks that invented other things would have died of disease before they could ever get around to inventing the other stuff. Or - too busy hauling water from the pond.
Yes. Roman: Slave, run down to the river and fetch me a bath...............