What were the reasons for the differences between different colonies? Why did the colonies seek freedom?

What were the reasons for the differences between different colonies? Why did the colonies seek freedom? What are the consequences of gaining independence by the colonies?

The differences between the colonies were due to their past. Some territories before colonization had their own statehood (Algeria, Morocco, Burma, Vietnam, Sudan), others were completely backward (Burundi, Uganda). The colonies also differed depending on the level of the country that colonized them. The most developed were the British, they built universities and railways, the Dutch invested less in development, and the Portuguese were simply backward by themselves.

The colonies began to seek freedom after the creation of the UN and the general course of anti-colonial struggle, which inspired the socialist countries (USSR, China and others) and after the first successful examples of liberation from the colonialists (Burma, Indonesia, Vietnam).

The consequence was an increase in the number of states on the planet, the resettlement of the white population partially back to the metropolis, followed by the inhabitants of the colonies who knew the language of the metropolises (for example, French). In the newly independent states themselves, there were many problems, both economic and ideological (confrontations between the left and the right, for example, in Indonesia in the 1960s).