In the long term we can hope that religion will change the nature of man and reduce conflict. But history is not encouraging in this respect. The bloodiest wars in history have been religious wars.
The Cold War isn't thawing it is burning with a deadly heat. Communism isn't...
You do have to change things as warfare changes.
My eyesight is not nearly as good. My hearing is probably going away. My memory is slipping too. But I'm still around.