What are the two periods of the history of Philosophy?

Period 1: Ancient Philosophy. From the 7th century BC to the 3rd century AD. It includes the classical Greek philosophy, Roman philosophy, and Alexandrian philosophy. The presocratic philosophers, the sophists, Socrates, Plato, and Aristotle are some of the most important philosophers of this period.
Period 2: Decadence of Philosophy. It includes the Cynics, the Cyrenaics, the Stoics, the Epicureans, the Skeptics, and the Eclectics.