How did John Rolfe save the Jamestown colony?

John Rolfe saved the Jamestown colony by introducing a profitable strain of tobacco, which became Virginia's cash crop and a crucial source of revenue. His successful cultivation of tobacco helped stabilize the colony's economy and attract new settlers. Additionally, Rolfe's marriage to Pocahontas fostered better relations with the Powhatan Confederacy, further securing the colony's survival. This combination of agricultural innovation and diplomatic ties was instrumental in Jamestown's eventual success.