You can always tell if a civilization is on the up or declining purely based on it’s plumbing and sewer system. Most civilizations can be judged to be advanced or to not avoid a pun plain crap by their use of plumbing, clean water and sewer system and if they are in decline by the same measures. A lot of civilizations have managed irrigation, and clean water supply but not done a lot about sewers such as the Maya, Egyptians, Sumerians and they can be judged to be semi advanced all of these declined rapidly when the sources of clean available water literally dried up. In Egypts case multiple times. An early example of the true mastery of water and an advanced civilization is Rome which also mastered the sewer and public toilets on an epic scale as it’s mastery of the above grew so did Romes might and the simple aqueduct help them conquer the world or rather the bit that mattered. Rome declined when it’s ability to maintain it’s plumbing declined first as knowledge was lost and a don’t give a damn buearocracy took over. Without true mastery of water disease spread more easily and towns shrank.
It was more than 1600 years before another civilization again truly mastered water and that is our own the benefits were immense as new sewers were created to get rid of waste were constructed, clean water became abundant as did irrigation, canals, dams etc. It’s been impressive as the West mastered water it conquered the world then led it into modernity beyond anything achieved before.
However now we see that this infra structure is being poorly maintained, water resources are becoming scarcer and the simple act of having a working flushing toilet is becoming rarer. I know we are doomed as a civilization because the new automatic flushing toilets at work have been designed by environazis and don’t f&cking flush or work worth a damn. When Green idiots are allowed to mess with the plumbing and design is valued over actual function your civilizations days are numbered.