  Nowadays, it is thought that there are only two approaches to political
economy: public finance and public choice; however, this research aims to
introduce a new insight by investigating scholastic sources. We study the
relevant classic books from the thirteenth to the seventeenth centuries and
reevaluate the scholastic literature by doctrines of public finance and public
choice. The findings confirm that the government is the institution for
realizing the common good according to scholastic attitude. Therefore,
scholastic thinkers saw a common mission for the government based on their
essentialist attitude toward human happiness. Social conflicts and lack of
social consent are the product of diversification in ends and desires; hence,
if the end of humans were unified, there would be no conflict of interest.
Accordingly, if the government acts according to its assigned mission, the lack
of public consent is not significant. Based on the scholastic point of view
this study introduces the third approach to political economy, which can be,
consider an analytical synthesis among classical doctrines.
