Literary critic Harold Bloom wrote that Heart of Darkness had been analysed more than any other work of literature that is studied in universities and colleges, which he attributed to Conrad's "unique propensity for ambiguity." However, it was not a big success during Conrad's life.   When it was published as a single volume in 1902 with two more novellas, "Youth" and "The End of the Tether", it received the least commentary from critics.  F. R. Leavis referred to Heart of Darkness as a "minor work" and criticised its "adjectival insistence upon inexpressible and incomprehensible mystery".  Conrad himself did not consider it to be particularly notable.  By the 1960s, though, it was a standard assignment in many college and high school English courses.
Most Kayapos continue to teach their young people the skills necessary to survive in the rain forest. These include hunting, fishing, trekking, and making and using canoes. Growing vegetables, beading, body paint preparations, and cooking are skills Kayapo girls are expected to know. Some missionaries in the Xingu River area have attempted to offer a more Western-style education, including reading and writing. However, many Kayapos have been extremely wary of accepting this type of schooling. They are concerned that their children will be lost to them and will forget traditional skills.
Remarkably the colonial Royal Museum for Central Africa (Tervuren Museum) does not mention anything at all about the atrocities committed in the Congo Free State . The Tervuren Museum has a large collection of colonial objects but of the largest injustice in Congo, Hochschild wrote: " there is no sign whatsoever. " Another example is to be found on the sea walk of Blankenberge, a popular coastal resort, where a monument shows a colonialist with a black child at his feet (supposedly bringing him "civilization") without any comment .