Unhappy events abroad have retaught us two simple truths about the liberty of a democratic people. The first truth is that the liberty of a democracy is not safe if the people tolerate the growth of private power to a point where it becomes stronger than their democratic State itself. That, in its essence, is fascism — ownership of government by an individual, by a group or by any other controlling private power.
The second truth is that the liberty of a democracy is not safe if its business system does not provide employment and produce and distribute goods in such a way as to sustain an acceptable standard of living. Both lessons hit home. Among us today a concentration of private power without equal in history is growing.

Simple Truths message to Congress (April 29, 1938).

Franklin D. Roosevelt: Message to Congress on Curbing Monopolies.[presidency.ucsb.edu]