By Tobias Carroll It has now been 20 years since the release of The Bourne Identity, the thriller that kicked off an enduring action franchise and helped reinvent the genre along the way. A lot has been written about how the Bourne films helped to change contemporary action filmmaking, with plenty of credit given to director Paul Greengrass’s penchant for shaky, hand-held camera work. While the series as a whole is looked back on fondly, opinions differ as to the series’s high and low points. But the star of four of the five Bourne films, Matt Damon, has his own thoughts on where the series wo…