The Danger of Instrumental Reason

The danger of instrumental reason is that it's completely possible to mistake a process that is entirely rational for its being something humanity should ever want actually implement. See, instrumental reason can only get us from point a to point b, but who out there gets to decide what point b should consist? Of? Left in the hands of the enlightenment, many critics believed it led to the chaos of the twentieth century. So this raises the question, how do we ever insure that the ends we're trying to achieve never become co opted as habermas feared,. by a single thinker or group that happens to tivate a particular culture with a compelling argument during their time? History has shown us this is