 Aristotle favors an approach that works through private ownership. In Plato’s Republic, almost all of the resources held by the guardians are held as collective assets that the guardians may use for the sake of the common interest of the  community.[22]  Importantly, because the guardians hold almost nothing as private property, they do nothing that is analogous to the choices that a group of friends might make on a camping trip to voluntarily pool their resources for the sake of common interests. In other words, the guardians do not express their concern for the members of the community through gifts, donations or other forms of private contribution. Partly for this reason, Aristotle favors an arrangement in which citizens have private ownership and control over assets and a civic obligation to pool these assets for the sake of common interests (see Kraut 2002: 327–56). For example, if the community faces a naval threat, wealthy citizens in Aristotle’s ideal community would be responsible for building warships and contributing these ships to the war effort.