Please blame it on the media. It is bombarding us round-the-clock with "news" -- talking about murders, wars, conflicts, silly gossips. In fact, media reporting has simply trivialized human suffering. It affects us and our minds and how we think. It is a blatant misuse of freedom of speech.
World will be similar to heaven IF ONLY someone bans negative reporting in media. It should only be allowed to talk of positive activities, good deeds of people, scientific discoveries with positive implications, how someone saved a life, how a hard-core politician did not lie, how someone did not cheat his wife, how someone helped a neighbor, and so on. It should focus on good work of NGOs helping the needy and poor around the world. It should talk ONLY of lives they saved rather than people murdered by NATO or some suicide bomber.
If you are too troubled by negativity around you, please meditate and cleans your mind of the negative garbage. Take at least two off days from the media every week and ultimately drive negative talkers out of your life.