<Li> Cleanthes (of Assos) (330--232 BC), second head of Stoic Academy </Li> <Li> Chrysippus (280--204 BC), third head of the academy </Li> <Li> Diogenes of Babylon (230--150 BC) </Li> <Li> Antipater of Tarsus (210--129 BC) </Li>

Who were the stoics what were their teachings