Progress doesn't come from early risers — progress is made by lazy men looking for easier ways to do things.

From The Shape of History: Ian Morris, historian on a grand scale by Marc Parry.

Social behavior boils down to the "Morris Theorem": "Change is caused by lazy, greedy, frightened people looking for easier, more profitable, and safer ways to do things." These people are much the same everywhere. Their societies develop along similar paths. Geography explains different outcomes. "Maps, not chaps," as Morris likes to say.

The Morris Theorem sounds a lot like Heinlein. From Time Enough for Love,

Progress doesn't come from early risers — progress is made by lazy men looking for easier ways to do things.