Hellenistic philosophy refers to the philosophical thought that emerged in the Mediterranean world after the death of Alexander the Great in 323 BCE, lasting until the rise of the Roman Empire. It encompasses various schools of thought, including Stoicism, Epicureanism, and Skepticism, each offering different perspectives on ethics, knowledge, and the nature of the universe. These philosophies often emphasized practical ethics and the pursuit of happiness, focusing on how individuals could achieve a good life amidst the uncertainties of the time. Hellenistic philosophers sought to provide guidance on personal conduct and the cultivation of virtue, influencing later philosophical traditions.