The doctrine of Malthus--Progress in wheat-growing--East Flanders--Channel Islands--Potato crops, past and present --Irrigation--Major Hallet's experiments--Planted wheat. Few books have exercised so pernicious an influence upon the general development of economic thought as Malthus's Essay on the Principle of Population exercised for three consecutive generations. It appeared at the right time, like all books which have had any influence at all, and it summed up ideas already current in the minds of the wealth-possessing minority. It was precisely when the ideas of equality and liberty, awakened by the French and American revolutions, were still permeating the minds of the poor, while the richer classes had become tired of their amateur excursions into the same domains, that Malthus came to assert, in reply to Godwin, that no equality is possible; that the poverty of the many is not due to institutions, but is a natural law. Population, he wrote,...