An economic man, i.e., the leading role in economic ethics, has been deeply investigated in our study considering a human being’s economic behavior and the hypotheses for an economic man in traditional economics based on M. Weber’s and S. N. Bulgakov’s Christian economic man. Among various channels to study business ethics and economic ethics, we chose the definition of an economic man given by Weber and Bulgakov to review a hypothesis about a rational economic man in economics and discussed L. (...) von Mises’s and A. Sen’s contentions for an economic man’s substantive freedom and innermost being. The issue deserved to be further investigated by scholars who concern business ethics and economic ethics consists in reconciling egotism and altruism commonly embedded in an economic man’s heart and boosting more altruistic economic men. (shrink)