The tension between enterprise as a means and sustainability as an end is directly related to the tension between rights to exclude others from a stream of private benefits and rights to be included in streams of environmental improvements. Resolving this tension is necessary if we are to square the circle between sustainability and enterprise. I begin for perspective with a brief review of the enclosure of land, and the widely cited notion of the Tragedy of the Commons. I then consider the modern version of the debate, surrounding informatics and, more specifically, intellectual property in plant genomics. The last part of the discussion focuses on a synthesis in which the two faces of enclosure - to be excluded and to be included - are brought together with democratic theory to give "sustainable enterprise" coherence and meaning.