We can’t have free energy because, to quote the late, great Robert A. Heinlein, TANSTAAFL.
We can’t have free med bed healthcare because med beds do not exist.
Russia-Ukraine should have finished years ago but it drags on.
You can thank Putin.
The Middle East should have been resolved two thousand years ago but it drags on.
You can thank religious fundamentalism.
...there are enough of us now that simply will not allow that to happen ever again and I mean ever again.
No, there are not. Human behavior is predicated on the problem of insufficient resources, and while that problem remains, so will armed conflict.