Exact is too hard, but I can take an estimated guess. Off the top of my head here, but a combination of institutional differences, proximal exposure to supporti

Exact is too hard, but I can take an estimated guess. Off the top of my head here, but a combination of institutional differences, proximal exposure to supporting institutional systems, strong national identity, and sustained economic growth (shared). I don't have much time and this is will be exceedingly reductionist, but... It worked for Western Germany, not for Eastern Germany. The West was rebuilt by an Allied council and the East by a Soviet Bloc. After the economic collapse of the USSR and reunification of Germany, Western Germany extensively prepared for the transition process. Another example of this is North and South Korea, prior to Korean War North Korea was the dominant economy. North has not collapse due to Chinese support. Japan was also rebuilt with the US's help under the condition of democratic reforms. Japan saw immense economic growth afterward under that system. The Middle East is difficult due to a lack of cohesive national identities in the countries stemming from longstanding tribalistic tendencies, without proximally supporting liberal institutions. Well, except Israel, but that's an obvious conflict of interest. Autocrats and monarchies overcome culture barriers with force and threat of force. As for China, they were handed a MASSIVE economic opportunity for reestablishing diplomatic relations--lopsided exchange in China's favor IMO. This is also why the US has the "Rust Belt" and other economic dead zones throughout middle America that were once manufacturing towns. It may even help explain, the roaring-80s. The US did not anticipate an economic transfer as fast as it occurred. Different topic... Rapid Chinese economic growth empowered the CCP to maintain its status as a champion of the people for improving the quality of life across the nation as a product of the CCPs policies, which occurred at the rate and ease that it did largely thanks to Kissinger coaxing Nixon to made a "great deal" with Mao. And, this isn't meant to dismiss the Chinese population's agency fostering the growth, only that it wouldn't have happened anywhere near as fast as it did without the US trade deal. As for much, not all, of Eastern Europe, and, including Russia. Soviet corruption remained and didn't see enough economic growth to justify embracing liberal democracy. Many people think or are lead to believe that life was better under Soviet rule, even though the mechanism of economic growth it implemented was doomed to fail in the long-run.