@Bo, you are completely missing the point. Which isn' surprising given you didn't rwad the article.
It points to a corellation not causation. And it is this historic momentum which is important, not the specifics or who did what 100 years ago, but the general feeling of identity which we now have based on the stories of who did what 100 years ago.
"Really though, most countries are built upon the exploitation of some group or other. You'd be hard-pressed to find countries with egalitarian beginnings."
*cough* Ireland *cough* But seriously, you'd be hard pressed because you're thinking of western countries which took part in a largely european imperialist conquest.
All of South America? Divided between Spain and Portugal, North America? Between France and Britian. All of North Asia? Is currently called Russia. Australia, New Zealand?
There are the odd exceptions, China has it's own imperialist past.
That said, when the colonisers left Africa (and a power vaccumn in place) most black rulers who took over filled the same roles which the europeans had abandoned. Historical momentum here. Institutions which were vital to keeping power and running people's lives, continued with differet names. The same basic structure kept in place. (You could say the same about Russia, same authoritarian power structure going from Tzarist Empire, to Communist Dictator, to Putin's 'Democracy' - historical momentum keeping everythig going)
So a lot of African countries still suffer from corruption and oppression, left behind by colonialism. But Asia is not the same. India held onto a lot of it's own identity and culture.
Also, 'everyone else did it' is not a good arguement for anything, EVER.