 A second part of the debate focuses on ends rather than institutions. Locke states in the Two Treatises that the power of the Government is limited to the public good. It is a power “that hath no other end but preservation” and therefore cannot justify killing, enslaving, or plundering the citizens (2.135). Libertarians like Nozick (1974) read this as stating that governments exist only to protect people from infringements on their rights. An alternate interpretation, advanced by Tuckness (2002b, 2008a), draws attention to the fact that in the following sentences the formulation of natural law that Locke focuses on is a positive one, that “as much as possible” mankind is to be preserved. On this second reading, government is limited to fulfilling the purposes of natural law, but these include positive goals as well as negative rights. On this view, the power to promote the common good extends to actions designed to increase population, improve the military, strengthen the economy and infrastructure, and so on, provided these steps are indirectly useful to the goal of preserving the society. This would explain why Locke, in the Letter, describes government promotion of “arms, riches, and multitude of citizens” as the proper remedy for the danger of foreign attack (Works 6: 42).