People often use the term “Third World” as shorthand for poor or developing nations. By contrast, wealthier countries such as the United States and the nations of Western Europe are described as being part of the “First World.” <span>Most Third </span>World countries<span> are former colonies. Having gained independence, many of these </span>countries<span>, especially smaller ones, were faced with the challenges of </span>nation<span>- and institution-building on their own for the </span>first<span> time. Due to this common background, many of these </span>nations<span> were "</span>developing<span>" .
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According some authors which discuss this theme there were some factors as:
1) At the middle of 1850 the Chinese were still under British rule and the conditions were very difficult.
2) The devastation of southern Chinese by the taiping rebellion. This destroyed the rural economy and killed more than twenty millions people.
3) The gold was discovered in California in 1848. It produced a big immigrations at the final of century 17th.
aging due to decreased death rates.
Buying factors of production from firms.