A hallmark of post-modern historiography is exactly discarding this history can only be perceived through a western-european lens, and acknowledging that there are as many valid ways of looking at the past as there are cultures and people around the world.
> Japan, Singapore, Korea, and of course China
Neither Japan, Korea nor China were "third world" countries before WWII. Or even ever.
On the contrary. Japan was very much an industrialized nation in the 1930s. Before then, it has a long history as a advanced, albeit, regional power. The same is true about Korea. Chinese history itself is rife with empires and kingdoms - having trade networks, technological advances and so on - some of which being as large and influential - if not more - then the Roman Empire during its heyday.
Singapore already was a bustling trade port long before WWII, and has a history of being part of powerful local sultanates before the arrival of the British.
If anything, the examples you gave are quite ambivalent about the historical dynamics that led to their integration in today's modern global economic, geo-political, cultural structures and global power balances which were borne out of post-WWII victors creating a new order for peace and development.