Morality is custom

Since Law is custom, and morality is a sort of localised short-range-interaction law, it follows that morality ought to be custom too. Having thought and written that, it seems uncontroversial; people are used to the idea that morality is customary.

This is not the same as morality-is-arbitrary, which people sometimes assert. There is a not-clearly-defined ground of morality necessary for a society to be stable enough to last long enough to develope customs^{1, 2}. If you decided to assert that "theft is morally acceptable" you wouldn't last long, even if your law prohibited theft.

Refs

* On morailty, 2008. Not really satisfactory, because I'm not distinguishing L from M, but the direction is correct.

* Monty Python, RAF Banter.

* The Case for Libertarian Friendliness.

* Human Deaths from Hot and Cold Temperatures and Implications for Climate Change (Patrick Brown, Breakthrough Institute) via RP.

* Natural Variability, Attribution and Climate Models #6 - Science of Doom.

Notes

1. Hence the fairly common assertion that "without religion, you have no morality" is wrong.

2. See-also my Book Review: The Righteous Mind.