But the state system born of the social contract was also anarchic (without direction). Just as individuals were sovereign in the state of nature and thus let themselves be guided by their own interests and by the absence of rights, States now act in their own interest in competition. Thus, like the state of nature, states had inevitably come into conflict because there was no sovereign who went beyond the (more powerful) state, capable of imposing on everyone a system such as the laws on social contracts by force. In fact, Hobbes`s work served as the basis for the theories of realism advanced by E. H. Carr and Hans Morgenthau. Hobbes wrote in Leviathan that people (“we”) need the “terrour of a certain power,” otherwise people will not respect the law of reciprocity, “(on the whole) do to others as we would.”  The theory of an implied social contract is that people, by remaining in the territory controlled by a society that normally has a government, give their consent to join that society and, if necessary, to be governed by their government. This approval gives legitimacy to such a government. Modern Anglo-American law, like European civil law, is based on a theory of the will of the treaty, according to which all contractual conditions are binding on the parties because they have chosen these conditions for themselves. This was not true when Hobbes wrote Leviathan; At the time, more emphasis was placed on the review, i.e.
a reciprocal exchange of the benefits necessary for the formation of a valid contract, and most contracts had implicit clauses that stemmed from the nature of the contractual relationship and not from the decisions made by the parties. Accordingly, it has been argued that the theory of the social contract is more compatible with the contractual law of Hobbes and Locke`s time than with the contractual law of our time, and that certain characteristics of the social contract that seem to us to be unsanquentanomal, such as the belief that we are bound by a treaty formulated by our distant ancestors, Hobbes` contemporaries would not have seemed as foreign as we are.  Rousseau also analyzes the social contract with regard to risk management, thus proposing the origins of the state as a form of mutual insurance. David Gauthier “neo-hobbesian” The theory holds that collaboration between two independent and selfish parties is indeed possible, especially when it comes to understanding morality and politics.  Gauthier stresses in particular the benefits of cooperation between two parties with regard to the challenge of the prisoner dilemma. It proposes that if two parties comply with the original agreement and the morals set out in the treaty, they should both achieve an optimal result.   In its social contract model, factors such as trust, rationality and self-interest act honestly and prevent it from breaking the rules.   The fundamental assumption of the theory of the social contract is the idea that societies and cultures develop on the basis of a normally implicit convergence between individuals on the environment in which they want to live. After this assumption, individuals are required to behave according to the rules of the societies and cultures in which they live. The theory of the social contract also appears in Crito, another dialogue of Plato.