here is an easy paper about "the elements of a general theory of social change" http://home.uchicago.edu/~rmyerson/research/stratofc.pdf http://home.uchicago.ed

here is an easy paper about "the elements of a general theory of social change" http://home.uchicago.edu/~rmyerson/research/stratofc.pdf http://home.uchicago.edu/~rmyerson/research/stratofc.pdf