Beside the contributors to the Encyclopaedia, and sometimes among them, were men of different schools of thought, allied with them in advocating change. Quesnai and Turgot were conspicuous in the ranks of an eminent sect termed by some Economists, by others Physiocrats. The Economists shared with Diderot and his colleagues the zeal for reform, the contempt for the past, the democratic temper of the times. They were prepared to enforce equality even at the cost of despotism. They insisted on the subordination of all private rights to the public interest. They preached the necessity of national education as the first essential of national prosperity, and urged that the burden of taxation should be thrown upon the land, which they regarded as the sole source of wealth. They advocated free trade, free agriculture, free industry, while they cared little for freedom itself. Others like Morelly, the author of the _Code de la Nature_, accepted the Economist theory of the omnipotence of the State, but added other theories of their own. Morelly proposed to establish community of goods and uniformity of all conditions. He denounced the institution of private property, and he shadowed forth in their earliest shape many of those suggestions for the readjustment of the world, which have since assumed the name of Socialism and acquired the dimensions of a spectre in minds intolerant of change. But far above the sound of other voices rose the lofty tones and the sonorous rhetoric of Rousseau. Rousseau disdained the study and analysis of the past, in which Montesquieu had sought laborious wisdom. He cared nothing for the diffusion of knowledge and art, of which Voltaire was the brilliant representative. He hardly understood the wide, ambitious projects, by which Diderot and Turgot hoped to benefit humanity. He resented the utilitarian theories of Helvetius. He hotly denied the material philosophy of the school of Holbach. To Rousseau's angry discontent with life, study, knowledge, cultivation, seemed to be only steps in the degradation of man. To his inflamed vision all society was artificial, all accepted forms of political organisation were tyranny and abuse. Man, he protested, was naturally good and just and loving, created by a just and loving God, until art, the bane of life, invaded his simplicity, tainted his virtue, and brought him face to face with suffering and sin. Sweep away therefore, he exhorted his hearers, all the false fabric of society, the world of ugly want and insolent riches miscalled civilization, the oppression miscalled order, the error miscalled knowledge! Level its inequalities, repudiate its learning, break its conventions, shatter its chains! Let men return to the simplicity of ancient days, to the idyllic state, when uncorrupted instinct only ruled them, and there once again, innocent and ignorant, as Nature made them, and guided only by the 'immortal and celestial voice' of reason, seek the high paths of felicity of life.