...because out of bad and evil, some good is defined. Think about it, what would mean good without evil? People dont believe in God because they dont make the intellectual effort and for most of the time, ask stupid questions such as "if He exists, why all that evil?" or "why doesnt He do something".

The truth is, they're lacking knowledge and would like to understand what's an integral when they barely can count to ten.

So here's my advice, in any effect there is a cause, hence the question is simple : "why did it happen?"... to answer the question, one is going to have to deal with different sciences, but surely light is going to sweep the darkness. Seeking knowledge is what we should all do in order to understand what is really "LIFE".

[3:190]
Behold! in the creation of the skies and the earth, and the alternation of night and day, -there are indeed Signs for men of understanding.