Even an entire society, a nation, or all simultaneously existing societies taken together, are not owners of the earth. They are simply its possessors, its beneficiaries, and have to bequeath it in an improved state to succeeding generations.

Social progress can be measured by the social position of the female sex.

In the domain of Political Economy, free scientific inquiry meets not merely the same enemies as in all other domains. The peculiar nature of the material it deals with, summons as foes into the field of battle the most violent, mean and malignant passions of the human breast, the Furies of private interest.

The true law of economics is chance, and we learned people arbitrarily seize on a few moments and establish them as laws.

The religious world is but a reflex of the real world.

The economic concept of value does not occur in antiquity.