The Scottish enlightenment comes to mind, and was pivotal in the American Revolution.
Yes, a wonderful period with great thinkers like David Hume.
Sharing the humanist and rationalist outlook of the European Enlightenment of the same time period, the thinkers of the Scottish Enlightenment asserted the fundamental importance of human reason combined with a rejection of any authority which could not be justified by reason. They held to an optimistic belief in the ability of man to effect changes for the better in society and nature, guided only by reason.
During the Bush administration up to Inauguration Day, Europe has been more enlightened than America with regards to the recognition of scientific evidence, environmental policy, foreign policy, the wellfare state, human rights (extensive gay rights, euthanasia, abortion), animal rights, international law, education, death penalty, gun policy, etc. It seems that after a terrible 20th century, Enlightenment ideals finally returned to their cradle. Obama has promised Americans 'to lead once more'. The question is whether the US isn't lagging too much behind after this desastrous onset of the 21st century, but I'm rather optimistic that America's innate progressiveness and flexibility will be sufficient to take the lead, again.