Abstract
The problem considered in the paper is whether the stereotype of zerosum games is applicable to present-day discussions on environmental threats. Decision theory could be considered as a tool to substantiate the philosophical notion of rationality of actions and in this aspect, it could be a good methodological instrument of philosophical economics. Decision theory can be used to assess positions in problem situations and predict possible solutions in terms of gains and losses. This can also be applied to human actions in relation to nature. In the paper this theory is used to assess the moral and political validity of the positions of developing countries against the main claims of the forceful countries for unified solutions for protection of the natural environment. Justified solutions in the field of environmental security can be sought only by overcoming the economic and social imbalances and corporate interests. The most justified perspective for international relations and in searching for solutions of present-day social and ecological conflicts is to move from the form of a zero-sum game, in which the powerful countries win and the poor ones invariably lose, to a true non-zero-sum game suitable for implementing cooperative strategies. This type of development can become a reality only on the basis of a new social contract, based on pluralism and balance of interests, on the scale of all humanity.