I don't believe society has learned much from the Aurora shooting. Even today I read of a woman in Detroit who randomly starting shooting at the PrincessDetroit, a ship that drove around a river. There is also the story of another man who has indicated in Twitter that he is going to commit a random shooting. Twitter will not give up his name so the police has to appeal to the court to force Twitter to give up his name.
As society goes further and further from God, so will the violence come closer and closer to society. When children in schools are taught that we are just animals from apes, today we are tomorrow we aren't, it will continue to put no fear, no hope and emptiness in the lives of all. All this and more, I believe will lead to yet more shootings.
We sure didn't learn that you have to take care of yourself. The only way you can do that is to shoot back.