- protestant work ethic
- limited government at all levels, especially the federal level
- abundant resources
- unbridled capitalism
- willingness to nearly exterminate the natives
- restrictive immigration policy that protected the culture for the most part and enabled an English speaking super majority.
- success in recruiting the best and brightest from elsewhere to come here from their home countries where they were either under appreciated or outright discriminated against.
- plus, we were blessed with the greatest founding fathers in the history of the world which make the intellectuals of today look like complete morons.
- willingness to fight to protect or expand.
- restricted voting rights for most of our history to only those who had earned the right.
I like your list.
I will add that they only exterminated the natives when necessary. Most other cultures would have gone and solved the problem permanently. The USA went for forced relocation on an on going basis rather than extermination.
I will also add that the USA really rose to power after the WWII smashed up everyone else.