In 1778, Jefferson was given the task of revising the state's laws. He drafted 126 bills in three years, including laws to streamline the judicial system. Jefferson's proposed statutes provided for general education, which he considered the basis of "republican government". He had become alarmed that Virginia's powerful landed gentry were becoming a hereditary aristocracy. He took the lead in abolishing what he called "feudal and unnatural distinctions." He targeted laws such as entail and primogeniture by which the oldest son inherited all the land. The entail laws made it perpetual: the one who inherited the land could not sell it, but had to bequeath it to his oldest son. As a result, increasingly large plantations, worked by white tenant farmers and by black slaves, gained in size and wealth and political power in the eastern ("Tidewater") tobacco areas. During the Revolutionary era, all such laws were repealed by the states that had them.