Imperialism from point of view of the colonized people?

Imperialism happened on a global scale, so the effects (whether positive or negative) differ from place to place. Some countries inherited the idea of democracy and used it competently, for instance, Botswana in Southern Africa. The people became more civilized and were converted to Christianity. They benefited from medical advances thus less children died at birth or from diseases like tuberculosis or tetanus. Most people were receptive of these advances but they (the advances) came at the cost of their national heritage. Old customs which defined their sense of being were slowly eradicated. Oral traditions were abandoned. Some countries, especially in Africa, have many ethnic groups within their boundaries (There are more than 200 different languages in Nigeria alone); this has led to battles like the Rwandan genocide between the Tutsis and the Hutus.