As they say, ignorance is bliss. If you never educate yourself about how other people in the world live and how your lifestyle impacts them, or how the food you eat is made, or the actions that governments take on your behalf, you won't feel empathy or anger about all the injustices and abuses that occur. Once you realize how much pain exists, and how much of it is a result of your action or inaction, then the real depression starts.