The human factor
Why people tend to choose violence over love will always be a mystery to me. Is it about numbers? Too much breathing bodies inhabiting Earth which boosts competitiveness and strangles empathy? It is possible. People are, after all, animals with heightened intelligence and lessened instincts. But being intelligent doesn't mean you can't be stupid. It only means you have the potential for greatness; whether you'll use it or not is another thing.
But all in all it is a wonderful world.