The work is devoted to analysis of reasons and roots of social dynamic, reflected in categories. Author considers questions, connected with mutual relations of such categories as “progress”, “revolution”, “reform” etc. Are investigated points of view of domestic (Gavrov S.N., Grechko P.K., Zavalko A.G., Semenov Y.I., etc.) and foreign authors (G.W.F.Hegel, R.Dahrendorf, K.Marx, J.A. Condorcet, K.R.Popper, A.Tojnbi). Making conclusion, that dynamic of society evolution needs its systemacy and integrity. In particular, it concerns such categories like “directionality of historical process”, “sources (causes) of society changes”
