What successes were experienced by the Jamestown colonists when they arrived in the new world?

When they got there, the settlers were faced with a salty estuary filled with disease carrying mosquitoes. Many came for gold, but of course there wasn't any, and since most of the men were used to a more leisurely life, they weren't exactly great workers. Another reason was because the company that funded the colony had no interest in their welfare, just a profit. During the first winter, most of them died. Things only changed when John Rolph found a way to successfully cultivate tobacco. At best, the only accomplishment was that some survived.