Modern Western thought has been shaped by an emphasis on scientific thinking and reasoning since the times 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 experience with the senses, not with religion or superstition. Notable ancient Greek historians, philosophers, and scientists, such as Thucydides, Socrates, Aristotle, and Hippocrates, sowed the seeds of modern Western thought. One ancient Greek writer who demonstrated modern scientific objectivity was Thucydides. Over time, this kind 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 are astonishing. A doctor today would be very impressed by the accuracy and detailed description of the plague: “Externally the body was not very hot to the touch, nor was there any pallor: the skin was rather reddish and livid, breaking out into small pustules and ulcers. .” This precise 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 medical and non-medical description today. 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 thesis. By thinking carefully about 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 the truth that you find impossible to bear; there is never the slightest difficulty in resisting Socrates.” This shows that Socrates viewed himself simply as a guide to logic. Aristotle, one of the earliest scientists, used evidence to support his claims. Today, every argument made must be supported by evidence. Any argument not supported by evidence is not accepted as fact. Aristotle's use of evidence 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 with any part of it. But observation shows that this is not the case. Any piece of land sinks, the faster the bigger it gets” he is able to prove his point with the use of evidence. The method by which Aristotle supported his arguments is constantly used today because it proves that the point being argued is true.