The development of the theories of history discussed in the first part of the book testify to the considerable advantages of the doctrines that distinguished in the evolution of humanity three qualitatively different epochs. However, since most such existing conceptions interpret the contemporary period as the embodiment of one of the most significant transformations ever experienced by humanity, questions about what this transition represents, what features of society have been left in the past and what features arising before our very eyes become the main ones, and whether, as a result of the changes today, a new society is emerging or whether we are presented with a modification - albeit a serious one - of the former social and economic relations become exclusively relevant.