clouded by annoyance and anger at free riders. Governmental solutions Governmental solutions are used when the above conditions are not met (such as a community being larger than the cohesion of its social network). Examples of government regulation include privatization, regulation, and internalizing the externalities. Privatization One solution for some resources is to convert common good into private property (Coase 1960), giving the new owner an incentive to enforce its sustainability. Libertarians and classical liberals cite the tragedy of the commons as an example of what happens when Lockean property rights to homestead resources are prohibited by a government. They argue that the solution to the tragedy of the commons is to allow individuals to take over the property rights of a resource, that is, to privatize it. In England, this solution was attempted in the Inclosure Acts. However, often this solution leads to increasing numbers of people being pushed into smaller and smaller pockets of common land which has yet to be privatized, thereby merely displacing and exacerbating the problem while putting an increasing number of people in precarious situations. In England, this led to Engels' pause. Regulation In a typical example, governmental regulations can limit the amount of a common good that is available for use by any individual. Permit systems for extractive economic activities including mining, fishing, hunting, livestock raising, and timber extraction are examples of this approach. Similarly, limits to pollution are examples of governmental intervention on behalf of the commons. This idea is used by the United Nations Moon Treaty, Outer Space Treaty and Law of the Sea Treaty as well as the UNESCO World Heritage Convention (treaty) which involves the international law principle that designates some areas or resources the Common Heritage of Mankind. In Hardin's essay, he proposed that the solution to the problem of overpopulation must be based on "mutual coercion, mutually agreed upon" and result in "relinquishing the freedom to breed". Hardin discussed this topic further in a 1979 book, Managing the Commons, co-written with John A. Baden. He framed this prescription in terms of needing to restrict the "reproductive right", to safeguard all other rights. Several countries have a variety of population control laws in place. German historian Joachim Radkau thought Hardin advocates strict management of common goods via increased government involvement or international regulation bodies. An asserted impending "tragedy of the commons" is frequently warned of as a consequence