Here’s another “incredibly fortunate” thing about the Cambrian explosion and about evolution generally.
Apparently orcas are threatened in an area of Canadian waters. The government has suggested voluntary sanctuaries.
They reason backwards: Birds evolved, therefore some poorly understood mindless processes must have driven them to evolve.
Note that “peaceful enjoyment by the inhabitants” is a very broad term that is not limited to human beings. Rather, it includes everything from grass, fish, and insects, to mice, snakes, and people.
Getting billions of people to stop eating meat isn’t very realistic, so some have put their hopes in lab-grown steaks made from stem cells.