I think there's a better argument than race for this.
With the exceptions of Canada, Australia, and New Zealand what is one thing all those countries have in common.
They've been some form of a nation, country, or Empire since PROBABLY around the fall of the Roman Empire in some fashion.
Argument could be made the Scandinavian countries were warring tribes of Vikings but even then, those groups/clans/tribes came together for common goals in the 850s or so. Same with England when all the Saxon kingdoms came together to kick out the Great Heathen Army that the Danes had assembled. Germany is the same around the time of the Crusades the large tribes came together for a common goal.
As such, they have existe din some form of a nation-state FAR longer than almost any country in the Middle East or Africa as those were largely separate groups of people forced together post WWI/turn of the 20th Century when the nations of Europe just arbitrarily dived up the continents.
this is correct, as my other post alluded
It's entirely a result of the Industrial Revolution occurring in what was white/Euro centric nations, and then the era of Imperialism/colonization truly began as they needed more natural resources like rubber and things that don't naturally occur. So obviously they were just pillaging those other nations, not only greatly helping their own GDP/development, but delaying and harming the host nations.
The reason Canada/Aus/US all are the shit now isn't b/c they are 'white', but the colonizers never left (and yes they were white).....everywhere else they left after WWII and the end of that era, but they had already firmly taken over (diseases didn't kill Africans and Asians the same way they did Aboriginals and Natives/First Nation tribes) here and those other places. Latin America they technically staid by mixing/creating the Mestizo class, but once the Monroe Doctrine and then Roosevelt later were around there wasn't as much influence anymore from Spain/Portugal or any outside nation barring the Panama Canal until the Soviets.
It's why S. Africa was still technically by far the most economically developed country in Africa during Apartheid (even if it sucked balls to be black there, it was better than whatever Central African Republic was called then), and Cape Verde is the richest one today as it was the last place to be decolonized (if we're not counting like Reunion and Mayotte by Madagascar as French Overseas regions or the Canary Islands which are part of Spain)
Japan wasn't colonized and thus developed on it's own and until recently dominated the entire Asian region post WWII economically (and S. Korea to a lesser extent). If China hadn't been Communist for so long it'd likely be in the same boat, i mean look at Hong Kong with it's heavy British/Capitalist influence and Macau from Portugal.
ME was dominated by the failing Ottomans until WWI, then carved up and exploited, and will likely never fully develop if they don't stop the Theocratic government common in the region.