<P> The cyclical theory refers to a model used by historian Arthur Schlesinger to attempt to explicate the fluctuations in politics throughout American history . Liberalism and conservatism are rooted in the `` national mood '' that shows a continuing shift in national involvement between public purpose and private interest . Each of these cycles includes a phase of dominant public interest , a transition phase , and a phase of prevalent private interest . </P>
<P> The cyclical theory refers to a model used by historian Arthur Schlesinger to attempt to explicate the fluctuations in politics throughout American history . Liberalism and conservatism are rooted in the `` national mood '' that shows a continuing shift in national involvement between public purpose and private interest . Each of these cycles includes a phase of dominant public interest , a transition phase , and a phase of prevalent private interest . </P>
who gave the cyclical theory of socail change
who gave the cyclical theory of socail change
Arthur Schlesinger
Arthur Schlesinger