What belief seems to have been shared by both imperialists

The answer is:

The belief that they had the right to spread it influences to other countries, and to promote modernization. This means that the barbarians they were colonizing should be brought to civilization, no matter how no matter what. Generally, imperialism used religion and political power to spread their beliefs.

Explanation:

I believe that one of the best support examples for this question is the ideology of the industrialist Cecil Rhodes. He believed that the spread of the British Empire through Africa and Asia should be a good thing because the British were carrying happiness, development, social equality, piety, and especially, civility with them. They were overcoming the barbarian. We all know the price paid by the colonized countries.

i believe it is capitalists.  

independent innovation during the abbasid caliphate