Figure 4 Interaction between ideas and society. 26. Figure 4 shows what George Soros (1987) calls a “shoelace model.” It depicts the interaction between ideas and society (Umpleby 1989). On the left side are listed Adan Smith, Karl Marx, John Maynard Keynes, and Milton Friedman. In each case, when th« ideas are accepted and acted upon, society changes — the growth of industry, the rise of labor unions, and larger government. New ideas lead to new social structures, and new social problems lead to new ideas. There is a co-evolution of theories and social svstems. social problems lead to new ideas. There is a co-evolution of theories and social