When did the evil against good actually start?

You can take any instance or moment of our daily life. For every good thing there is a balancing evil/bad thing. Many great inventions have took birth in the world for serving mankind. But very soon, a group of same mankind decodes some evils or negative points of that good thing, finds something new and use it as weapon of evil. For every good thing in this world, there exists a bad 'use' too. Not only Media, Television, Cartoons, weapons, mobiles and social networking sites, each and everything we see in our daily life.







As per your opinion, when might have such a procedure started? When did such selfish thoughts started which kills his neighbour? We should recollect that primitive man dreamt about food and shelter only and he fought only for these two.