High Quality Content by WIKIPEDIA articles! Slavery was common practice and an integral component of ancient Greece throughout its rich history, as it was in other societies of the time including ancient Israel and early Christian societies. It is estimated that in Athens, the majority of citizens owned at least one slave. Most ancient writers considered slavery not only natural but necessary, but some isolated debate began to appear, notably in Socratic dialogues while the Stoics produced the first condemnation of slavery recorded in history.