1. The First Age: “The first is from the beginning of the human race, that is, from Adam ^[1], who was the first man that was made, down to Noah ^[2], who constructed the ark at the time of the flood ^[3].”
2. The Second Age: “..extends from that period on to Abraham ^[4], who was called the father indeed of all nations..”
3. The Third Age: “For the third age extends from Abraham on to David ^[5] the king.”
4. The Fourth Age: “The fourth from David on to that captivity ^[6] whereby the people of God passed over into Babylonia.”
5. The Fifth Age: “The fifth from that transmigration down to the advent of our Lord Jesus Christ ^[7].”
6. The Sixth Age: “With His [Jesus Christ's] coming the sixth age has entered on its process.”

Source: The Six Ages of the World ^[8], Wikipedia.