When Did The World Become Flat World

In chapter 15, as the world became flat, some parts of the world remained unflat because they could not participate in the flattening process. The unflat world consisted of developing nations while the flat world consisted of developed nations. Since the unflat world could not participate, it has kept them unadvanced, stagnant, and deprived. Rural Africa, China, India, and Latin America were left behind because their nations were plagued with diseases due to their broken government system being unable to treat and prevent these conditions, which has kept these nations sick, dying, and stuck in poverty. In other parts of rural China, India, and Eastern Europe, where people were healthy but poor and stuck between the unflat and the flat world,