What roles did draco, solon, and peisistratus play in history of greek government

Draco was an Ancient Athenian politician who brought first Athenian written laws in 621 BC.

Solon was an Athenian lawmaker who brought first economic and constitutional reforms that led the state towards democracy.

Peisistratus was an Athenian tyrant who overthrew oligarchy and made many improvements that influenced Athenian prosperity and unification.  

the social historical theory explains the creation of the varnas, jats and of the untouchables. according to this theory, the caste system began with the arrival of the aryans in india. the aryans arrived in india around 1500 bc. the fair skinned aryans arrived in india from south europe and north asia.

eliminate individuals who opposed his rule