Benjamin N. Cardozo

If a man made himself an expert in any particular branch of human activity, there would result the strong tendency that a peculiar aptitude towards the same branch would be found among some of his descendants.

Lacking the direct test of success or failure, the voter tends to turn, not to those politicians whose measures have the best chance of success, but to those with the ability to 'sell' their propaganda. Without grasping logical chains of deduction, the average voter will never be able to discover the error that the ruler makes.