Plato's Republic was written in 380 B.C. It is known as a Socratic dialogue and is perhaps one of Plato's best known works. In book two, Socrates, Thrasymachus and Adeimantus decide to focus on a just city instead of a just man. The three then decide they will need guardians for this city.
In book three, they come with what the education should be for these guardians. Socrates breaks the education system into two. Poetry and fiction should not be allowed in the education,they then decide that the guardian should be educated on four virtues such as: wisdom, courage, justice and temperance. The second part should be on gymnastics, because they had the belief that the physical exercise would keep them healthier longer. They also decided that males and females should be given the same education. Wives and children should be shared and that there should be no personal property among them.
At the age of eighteen the would be guardians study intellectual studies and physical activity, then military training for two years. Ten years of math comes next. When they are thirty they have five years of dialect training. The next fifteen years are spent as leaders. By the time they reach the age of fifty,they are then considered fully aware of the form of the good and totally mature.