Hellenistic philosophy emerged after Alexander the Great's death, focusing on practical ethics and inner peace. The Cynics, led by Diogenes, rejected social norms and embraced asceticism. The Stoics, founded by Zeno, emphasized living in harmony with nature and cultivating virtue. Both schools were influenced by Socrates but developed distinct approaches. Cynics advocated extreme simplicity, while Stoics sought inner tranquility through reason and acceptance of fate. Their ideas on virtue, cosmopolitanism, and self-sufficiency continue to resonate in modern times.