Before that time the clan system had prevailed in Greece. The people were divided into family groups, each of which claimed to be descended from a single ancestor,--often a supposed deity. These clans held all the power of the state; not only in the early days, when they formed the whole people, but later, when Athens became a prosperous city with many merchant ships, and when numerous strangers had come from afar to settle within its walls. None of these strangers were given the rights of citizenship. The clans remained in power, and the new people had no voice in the government. But in time the strangers grew to be so numerous, rich, and important that their claim to equal rights could no longer be set aside. They took part in the revolution by which the despots were expelled, and in the new constitution that was formed their demand to be made citizens of the state had to be granted. Cleisthenes, the leader of the people against the aristocratic faction, made this new code of laws. By a system never before adopted he broke up the old conditions. Before that time the people were the basis on which governments were organized. He made the land the basis, and from that time to this land has continued the basis of political divisions. Setting aside the old division of the Attic people into tribes and clans, founded on birth or descent, he separated the people into ten new tribes, founded on land. Attica was divided by him into districts or parishes, like modern townships and wards, which were called Demes, and each tribe was made up of several demes at a distance from each other. Every man became a citizen of the deme in which he lived, without regard to his clan, the new people were made citizens, and thus every freeborn inhabitant of Attica gained full rights of suffrage and citizenship, and the old clan aristocracy was at an end. The clans kept up their ancient organization and religious ceremonies, but they lost their political control. It must be said here, however, that many of the people of Attica were slaves, and that the new commonwealth of freemen was very far from including the whole population. One of the most curious of the new laws made by Cleisthenes was that known as "ostracism," by which any citizen who showed himself dangerous to the state could be banished for ten years if six thousand votes were cast against him. This was intended as a means of preventing the rise of future despots. The people of Athens developed wonderfully in public spirit under their new constitution. Each of them had now become the equal politically of the richest and noblest in the state, and all took a more vital interest in their country than had ever been felt before. It was this that made them so earnest and patriotic in the Persian war. The poorest citizen fought as bravely as the richest for the freedom of his beloved state.