>The short period of boom in 50s/60s US and Canada was driven by WW2 devastation everywhere else.

The US just renamed "Department of Defense" to "Department of War" and they seem willing to go to any extreme to "Make America Great Again". Threatening to take over Canada, Greenland, and Panama already in the first few months of the current administration. Using US military on US soil. There's no line they won't cross. WW3 isn't off the table at all, unfortunately.