In the last decade the concept of the commons has increasingly become the basis of anticapitalist thinking in the antiglobalization (or, as some now have it, "the global justice") movement. It has been politically useful both as an alternative model of social organization against the onslaught of "there is no alternative" neoliberal thinking and as a link between diverse struggles ranging from those of agricultural workers demanding land, to environmentalists calling for a reduction of the emission of "hot house gases" into the atmosphere, to writers, artists, musicians and software designers rejecting the totalitarian regime of intellectual property rights. But, like any concept in a class society, it can have many and often antagonistic uses. Our paper will show that there is a use of the concept of the commons that can be functional to capitalist accumulation and it offers an explanation as to why this capitalist use developed, especially since the early 1990s. The conclusion of this paper will assess the political problem that this capitalist use of "the commons" (both strategically and ideologically) poses for the anticapitalist movement.