Why were so many distinctive cultures able to develop over time in asia?

Asia is the biggest of the world's landmasses, covering roughly 30 percent of the Earth's land. It is additionally the world's most crowded continent, with about 60 percent of the complete populace.

The geographic term "Asia" was initially utilized by old Greeks to depict the developments east of their empire. Antiquated Asian people groups, considered themselves to be a differed and various blend of societies—not a collective gathering.

Today, the expression "Asia" is utilized as a social idea, while subregion groupings depict the particular geopolitical personalities of the landmass. These characterizations are Western Asia, Central Asia, Southern Asia, Eastern Asia, Southeastern Asia, and Northern Asia.

so, based on the research i've done. the u.s. government were always on a wild goose chase just to take down castro. he then retired his trone to his brother raul in 2008 due to some health issues. so it's obvious your answer would be:

castro had no allies from which he could receive aid.

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                                                    -wolfiewolffromsketch