polybius gave the cycle theory of social change.
who gave the cycle theory of social change?
polybius
social cycle theories are among the earliest social theories in sociology. unlike the theory of social evolutionism, which views the evolution of society and human history as progressing in some new, unique direction(s), sociological cycle theory argues that events and stages of society and history generally repeat themselves in cycles. such a theory does not necessarily imply that there cannot be any social progress. in the early theory of sima qian and the more recent theories of long-term ("secular") political-demographic cycles as well as in the varnic theory of p.r. sarkar an explicit accounting is made of social progress.
social cycle theory
austrian business cycle theory





























the austrian business cycle theory (abct) is an economic theory developed by the austrian school of economics about how business cycles occur. the theory views business cycles as the consequence of excessive growth in bank credit due to artificially low interest rates set by a central bank or fractional reserve banks. the austrian business cycle theory originated in the work of austrian school economists ludwig von mises and friedrich hayek. hayek won the nobel prize in economics in 1974 (shared with gunnar myrdal) in part for his work on this theory.
austrian business cycle theory