A great overview, Bob-a-rama. Most people don't realize how rapidly ecological change can occur when something new intervenes. Species come and go. Probably the current human species as well, in a matter of time beyond individual reckoning. Look how fast the so-called "western diet" has produced deadly diabetes around the world. Never mind coronavirus.

I've just come from New Zealand, where succeeding waves of newcomers have vastly altered what was once a pristine self-contained environment, with flightless birds, no snakes, and gigantic trees. Rats, possums, hungry humans, and millions of sheep changed everything almost within human recollection. And in North America, the invasion of agriculture in prairies home to the bison? Well, the Dust Bowl, for one thing. Humans are sadly careless of our beautiful blue planet, and not just with pollution.

I did my bit by refusing motherhood. Not everyone wants that, but think how many mini-Me's will not be using up resources in the future.