According to Scholasticism, truth is God's a0.

(God is the answer of all truth) and it is impossible to think that he would teach in the natural order anything that contradicts what he teaches in the super natural order*

By giving to human beings nature which requires the co-operation of other human beings for it's welfare, God ordained man for society, and this it is will princess govern with a view to the public welfare. The end for which exists is not merely vivere but bene vivere.