Own only what you can always carry with you: know languages know countries know people. Let your memory be your travel bag.
The next war... may well bury Western civilization forever.
There's no need to travel further. The Los Angeles area is big enough for us.
Loads of chemicals and hazardous wastes have been introduced into the atmosphere that didn't even exist in 1948. The environmental condition of the planet is far worse than it was 42 years ago.