CEVAP:

Collective Goods Problem: A central question of International Relations in modern times can be summed up as: How can a group, such as two or more countries, serve its collective interests when doing so demands that its members forgo their individual interests? This is the collective goods problem: how can something be provided to benefit every member of a group, regardless of what each member may contribute to the goods? It is probably easier to provide collective goods (or benefits) to smaller groups than to larger ones. Cheaters and “free riders” can be identified more easily in a smaller group than in a larger one.