Modern Western thought has been shaped by the emphasis on scientific thinking and reasoning since the days of Copernicus, Galileo, and Newton. The scientific revolution gave rise to a new era of thinking, in which observations were made to support an idea. It was about what man could prove through the senses, not through religion or superstition. Prominent historians, philosophers, and scientists of ancient Greece, such as Thucydides, Socrates, Aristotle, and Hippocrates, laid the foundation for modern Western thought. An ancient Greek writer who demonstrated modern scientific objectivity was Thucydides. Over time, this type of scientific objectivity has become a valuable tool of modern Western thought. The vividness and detail of Thucydides' description of the effects of the plague is striking. A doctor today would be very impressed by the accuracy and detailed description of the plague: "Outwardly the body was not very hot to the touch, nor pallor: the skin was rather reddish and livid, turning into small pustules and ulcers. .” This accurate description of the plague would be comparable to any description written today. The scientific objectivity demonstrated by the ancient Greeks has had a direct influence on our current medical and non-medical description. Many ancient Greeks, like Socrates, used logic, another invaluable tool of modern Western thought. Socrates, by asking simple questions, was able to get answers from people who supported his argument. By thinking through a problem step by step, Socrates was able to formulate answers to a problem or question. This laid the foundation for modern logic. “Not at all, my dear Agathon. It is a truth that you find impossible to resist; there is never the slightest difficulty in resisting Socrates. This shows that Socrates saw himself simply as a guide to logic. Aristotle, one of the earliest scientists, used evidence to support his claims. Today, any argument made must be supported by evidence. Any argument not supported by evidence is not accepted as fact. Aristotle's use of proofs made his arguments strong and convincing, even though he was completely wrong. When Aristotle writes: “Again, if the earth as a whole is capable of floating on water, this must obviously be the case for any part of it. But observation shows that this is not the case. Any piece of land goes to the bottom, the faster it gets,” he is able to prove his point using evidence. The method by which Aristotle supported his arguments is constantly used today because it shows that what is being argued is true..