At the start of the 1970s, the theories of Laing and the models of Nash began to converge, leading to a popular belief that the state (a surrogate family) was purely and simply a mechanism of social control which calculatedly kept power out of the hands of the public. Curtis shows that it was this belief which allowed the theories of Hayek to look credible, and underpinned the free-market beliefs of Margaret Thatcher, who sincerely believed that by dismantling as much of the British state as possible—and placing former nationalised institutions into the hands of public shareholders—a form of social equilibrium could be reached. This was a return to Nash's work, in which he proved mathematically that if everyone pursued their own interests, a stable, yet perpetually dynamic, society would result.