Can any body tell me about the strengths and weaknesses of colonialism?

It depends where the colonialism was taking place.Generally the strength of colonialism was that they had tools especially for raw material making,they were more clever to the one colonized,they build industries and they offered employment,the one colonized were more inferior to the colonizer especially in Africa where the blacks were inferior to the whites.And there weakness is that they did not know the language of the country they were colonizing.also they faced difficulties to some other chiefs and ancestors.and some of the diseases in Africa made them to run away.