While there are definitely a number of negatives to colonialism, there were most certainly a number of positives as well, many of which survive in one form or another today:
Architecture
Infrastructure (Road, rail, bridges, electricity, water supply and power generation)
Administration and legal systems
Education (Starting with missionary schools up to universities)
Medicine
Military infrastructures and training
Farming, Agriculture, food and textile production
Many of the peoples of Africa (not all) were at an early iron age cultural stage before Imperialism and they have been left with :
Medical services, a political and legal system, police, fire and military services, education, infrastructure services (water, electricity, railways, roads, buses), the modern cities of Africa, awareness of Africa's Natural Resources and development of markets for these, nature conservation (game parks), modern farms and farming techniques (although in may countries e.g. Zimbabwe these seem to have reverted to subsistence farming, the beginnings of a move away from inter tribal rivalries. (There were some down sides too but taken in the round imperialism probably did more good than harm - it was the speed with which it was demolished that caused problems).
Here is a link with positive and negative effects on Africa :)
http://www.scribd.com/doc/26009399/The-Positive-and-Negative-Impact-of-Colonization-in-Africa
The Europeans gave Africans the right to vote which then resulted into them voting for there own people to be leaders and eventually led Europeans out of Africa.
There is no positive effects of imperialism.
nothing
What were the positive and negative effects of imperialism in Cuba?
The positive effects of the invasion of Iraq was that the people were free of a murderous dictator. The downside is that it inspired the latest murderous dictator.
The positive affects in South Africa is that it will have many tourists.
"Scramble for Africa"
There weren't any.
nothing
One of the positive effects of European colonialism of Africa is that introduced efficient system of administration. They brought the industrial technology wit them which helped in the industrialization of many of the African countries.
There were positive effects as well as negative effects
the angola people died
what are the positive effects of socialism in south Africa politics
What were the positive and negative effects of imperialism in Cuba?
Nothing
The positive effects of the invasion of Iraq was that the people were free of a murderous dictator. The downside is that it inspired the latest murderous dictator.
Imperialism helped spread technology, infrastructure, and modernization to less developed regions. It also facilitated the exchange of ideas, cultures, and languages between different parts of the world.
The positive affects in South Africa is that it will have many tourists.
For Mexico, there was no positive effects at all. For countries such as the United States and France, it meant economic opportunities (at the cost of many lives and in detriment of Mexico, of course).