It is perhaps not surprising that the revival of contemporary contact theory took place at the same time as theoretician tools of gambling, and in particular negotiation theory, were applied to philosophical problems. The theory of negotiation developed by John Nash (1950) and John Harsanyi (1977) is a rigorous approach to modeling, as rational individuals would agree to share something good or surplus. In its most general form, the negotiation model of the agreement specifies a number of people who have individual utility functions that can be presented in relation to each other, without the need to directly compare interpersonal benefits. Certain goods or property intended for division are specified and, if the persons concerned can agree on how to distribute the property in question, they will receive this distribution.