What is the main conflict in The Conservationist by Nadine Gordimer?

When Mehring, a businessman who owns a "hobby" farm in South Africa, is made aware that a body has been found on his property, it forces him to examine his own life and mortality. As the cultural revolution of the 1960s and 1970s sweeps the world, the apartheid system in "old" South Africa is starting to crumble. Mehring takes in this changing scene as he deals with the black workers on his farm, his activist girlfriend, his bitter ex-wife in the U.S. and his rebellious son. Mehring must think hard about what he really wants out of life.