Issues of race and imperialism.

I am assuming that you would like some comments on these issues as they figure in Heart of Darkness, and I can certainly do so. However, in order to get a less general response, it is a good idea to pose a question or provide more specificity than you have right now.

The book is a reflection of the reality that imperialism almost inevitably involves the colonizing of a country of darker-skinned people by a lighter-skinned people. Sometimes there is a racial difference, but not always.  The colonizing of India, for example, did not generally involve a racial difference, since Indians have been considered Caucasian by anthropologists and India was occupied by the English  and the Portuguese, also Caucasian.  But this novella concerns a section of Africa that held black native peoples, and since it is the English colonists and merchants who occupy the area, certainly, there is an issue of race. 

Since in the Western world, we tend to use darkness to symbolize evil and lightness to symbolize good, a person might reasonably suppose that the title suggests that Africa is a dark, thus evil, continent, colonized by light, thus good, people, but that is not the case. It is the English who have dark hearts, not the native Africans. 

Each "scene" as the narrator travels up the river to the heart of this darkness is carefully selected to show the English in the worst possible light, as a people who treat others inhumanely for their own gains of money and power. 

There are those who seem to think that Conrad glorified colonialism and portrayed Africans as savages, but I think a careful reading of the story does not support this.