The invention that changed the galaxy would not have come about without the discovery that changed the galaxy. The discovery of hyperspace, or coordinating points in hyperspace to realspace, which can only be attained by light-speed, and is caused by "space wrinkles" lead to the invention of the hyperdrive. The hyperdrive is powered by fusion generators, and throws a ship into hyperspace by harnessing on to hyperspace itself. With distant systems becoming "closer," a government had to be formed. The Galactic Republic, which oversaw the galaxy, but trusted the systems to govern themselves and follow a few guidelines. Alas, more and more systems were found. As the Republic grew, so did the order of the Jedi.