The latin word responsibility reveals its true meaning: the capacity to respond, to act. - Over-anxiety ultimately banishes every trace of joy from life.
The dangers is that every religion, including the Catholic one, says "I have the ultimate truth." Then you start to rely on the priest, the mullah, the rabbi, or whoever, to be responsible for your acts. In fact, you are the only one who is responsible.
History will never change because of politics or conquests or theories or wars; that's mere repitition, it's been going on since the beginning of time. History will only change when we are able to use the energy of love, just as we use energy of the wind, the seas, the atom.
You can become blind by seeing each day as a similar one. Each day is a different one, each day brings a miracle of its own. It's just a matter of paying attention to this miracle.