George Washington was born into a world in which slavery was accepted. He became a slave owner when his father died in 1743. At the age of eleven, he inherited ten slaves and 500 acres of land. When he began farming Mount Vernon eleven years later, at the age of 22, he had a work force of about 36 slaves. With his marriage to Martha Custis in 1759, 20 of her slaves came to Mount Vernon. After their marriage, Washington purchased even more slaves. The slave population also increased because the slaves were marrying and raising their own families. By 1799, when George Washington died, there were 316 slaves living on the estate.