What John Rolfe changed life at Jamestown by?

John Rolfe significantly transformed life at Jamestown by introducing tobacco cultivation, which became a cash crop and a vital part of the colony's economy. His successful hybridization of tobacco seeds from the West Indies with native strains led to the production of a more marketable product, attracting investment and labor, including indentured servants. This agricultural shift not only bolstered the colony's financial stability but also paved the way for the expansion of plantation agriculture in the region. Additionally, Rolfe's marriage to Pocahontas helped establish a period of relative peace between the English settlers and Native Americans.