They ushered us onto the galactic stage. We couldn't have asked for a better guide. Above all Vulcans showed us that they're very responsible, and that responsibility is just a habit of doing the right thing.
Once we got in the habit of doing the right thing, we realized that we could accomplish anything. Once we could accomplish anything, we discovered the law of unintended consequences. Actions have consequences, so we established the Federation. We follow the Federation's directives, so we live long and prosper.
They showed us that deep commitment and steady character are the Vulcan way of prosperity and progress, longevity and logic.