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Being an analytical - discriptive, this article review the concepts of radical, liberal, moderate, conservative and reactionary in concerning with social and political groups. It clarify the concept of political change and political values, too. It has been said in this article that radicals are discontented with status quo, and they wish to change the existing order as soon as possible; liberals are less dissatisfied than radicals with status quo, but they also want to change it; moderates accept status quo, but thief dissatisfaction to change it is only a little more than that of conservatives which has no confidence in human morality and intelJigence, and in fear of
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reinstate the preVIous institutions. The author considers the motivations that cause people to lean the left or right, and he has mentioned the psychological factor, economic circumstatnces, age and huJnan nature factors. At the and he has taken some
consequences.