It is peculiar how suddenly and totally Marxism dropped out of anthropology. The date was quite precise, around 1979/80 when Thatcher and Reagan came to power and inaugurated neoconservative liberalism. The collapse of the Soviet bloc was related, but a decade later. Marxism got sidelined in much the same way that the unions lost power in national politics and Third World states were made to open up to capital in the 80s. Many former Marxists took up writers like Polanyi. But Marx is now once again a best seller in Germany, not because the Soviet empire has been reconstituted, but because neoliberalism's credit boom busted.
Tom Patterson's Karl Marx, Anthropologist (2009) is very timely and I have posted an entry on anthropology for a forthcoming Marx Companion.