Greek philosopher. A pupil of Plato, the tutor of Alexander the Great, and the author of works on logic, metaphysics, ethics, natural sciences, politics, and poetics, he profoundly influenced Western thought. In his philosophical system, which led him to criticize what he saw as Plato's metaphysical excesses, theory follows empirical observation and logic, based on the syllogism, is the essential method of rational inquiry. (1400 B.C.E. to 500 B.C.E.) earliest known Mexican civilization,lived in rainforests along the Gulf of Mexico, developed calendar and constructed public buildings and temples, carried on trade with other groups.priests/aristocrats were at the top of society, built a ceremonial center, wroshiped the jaguar and werejaguar, best remains are the stone carved heads at la venta, use of calendar, spread through trade, known for art, most important legacy was priestly leadership and devotion A hypothetical period that describes the status of the Islamic world from the mid-8th to the mid-13th century CE (sack of Baghdad by Mongols). During this period, artists, engineers, scholars, poets, philosophers, geographers and traders in the Islamic world contributed to agriculture, the arts, economics, industry, law, literature, navigation, philosophy, sciences, sociology, and technology, both by preserving earlier traditions and by adding inventions and innovations of their own. A war between the allies (Russia, France, British Empire, Italy, United States, Japan, Rumania, Serbia, Belgium, Greece, Portugal, Montenegro) and the central powers (Germany, Austria-Hungary, Turkey, Bulgaria) from 1914 to 1918.