Civilisation will not last, freedom will not survive, peace will not be kept, unless a very large majority of mankind unite together to defend them and show themselves possessed of a constabulary power before which barbaric and atavistic forces will stand in awe.
There is little that separates humans from other sentient beings - we all feel joy, we all deeply crave to be alive and to live freely, and we all share this planet together.
Really, the fundamental, ultimate mystery -- the only thing you need to know to understand the deepest metaphysical secrets -- is this: that for every outside there is an inside and for every inside there is an outside, and although they are different, they go together.
According to Krishnamacharya , practice and knowledge must always go together. He used to say, practice without right knowledge of theory is blind. This is also because without right knowledge, one can mindfully do a wrong practice.
The answer is, of course, that it would be best to be both loved and feared. But since the two rarely come together, anyone compelled to choose will find greater security in being feared than in being loved.