What was a result of Henry Clay's American System? It united the North, South, and West economically and politically. So I think it had a positive effect. It has helped the U.S. because it united our people. It hurt the U.S. because we now have arguments on which country is north, or south.
The negative effects of European imperialism in Africa include loss of independence, slavery, disunity among Africans, exploitation of resources and deterioration of African culture. The positive impacts include introduction of trade, education, new religion and new administration system.