I would submit that having principles and values is more than "hoping for the best". If you don't apply your principles when things are difficult, you don't have them at all. Today we often compromise what we say we stand for when presented with a problem, and frankly it has a tendency to bite us on the arse. But even when it doesn't, it doesn't make it ok. Britain claims to be a liberal democracy which upholds the fundamental rights of humans, but has engaged in torture, illegal wars, illegal surveillance and restrictions, and now is looking at stripping radicalised, trafficked and raped children of citizenship out of fear. Star Trek has told us that humanity is capable of moving beyond our fears and holding principles which matter. This idea that war is a great teacher of hard lessons really needs to die out, and Star Trek has previously presented a society that has learnt that, as Kirk says, overcoming savagery is as simple and as complex as saying "I will not kill today".