What if questions like that are very hard to answer for current events let alone the historical ones. But entire China would be like a Taiwan hypothesis seems a bit far fetched to me. Taiwan is a glorified city state compared to China. Developing a single island and transforming it into a single sector economy (semiconductor manifacturing and ic design) is one thing, developing a country from deserts of Xinjiang to the Pacific shores is another thing.
I guess If democracy was introduced to China before it's nationalization process had been completed, China would not be able to construct a modern/seculer common ground and culture for it's entire population and most probably would be divided. Even if KMT won the Civil war that would not stop the socialist movements because even if they were to lose the armed conflicts as long as USSR was there, there would be public support for socialist movements. Maybe there would be socialist insurgencies for decades.
On world front, KMT would most probably seek strong relations(and assistance of course) with US to protect itself from the socialist opposition at home. This could very well effect the fate of the cold war.
Too many things would change both in China and in world politics.
I guess If democracy was introduced to China before it's nationalization process had been completed, China would not be able to construct a modern/seculer common ground and culture for it's entire population and most probably would be divided. Even if KMT won the Civil war that would not stop the socialist movements because even if they were to lose the armed conflicts as long as USSR was there, there would be public support for socialist movements. Maybe there would be socialist insurgencies for decades.
On world front, KMT would most probably seek strong relations(and assistance of course) with US to protect itself from the socialist opposition at home. This could very well effect the fate of the cold war.
Too many things would change both in China and in world politics.