I think in part the Founding Fathers were right in their assessment in that industrial societies produce a class of citizen that has no perception of owning a vital interest in society.
Where the agrarian society in part produces a society where there is a general equality in personal interest in the prosperity of that society.
A wage laborer who can and sometimes must move from place to place to find work has little interest in what happens within the society beyond the need to supply him or her with payment for their labor. Owners of land however are more dependent on the economy prospering and society too. They cannot move and carry their main asset with them, the land so they are forced to seek solutions which benefit more people. Industrialism allows for greater selfishness because a good proportion of the population surrender their interest in society to more powerful individuals and groups such as corporations.