D’Alembert was one of the main authors of the Encyclopedie, as the name suggests an encyclopaedia of knowledge based on scientific discovery. It had a plethora of discoveries and solutions. There was a dawn of a new era of enlightenment, with the hope of a better future free from superstition and pessimism. He extolled the virtues of Bacon, Descartes, Newton and Locke, who by the desire to discover in a new world of possibilities, used every piece of knowledge and idea to fathom the mysteries of the Universe. D’Alembert claimed these men were the foundation of science, yet they were philosophers, theologians and students of the whole of existence. Their ideas provided the opportunity for others to expand knowledge, through applying their scientific principles to the world around. D’Alembert almost sycophantic in his praise, chronicled such work in the Encyclopedie. He praised the Philosophes who challenged everything; seek the truth and better future for all.