Actually, I am not so sure about this. Sure, it's convenient and saves time, but I wouldn't call it "a huge impact on humanity". It has been more than ten years since it has been around, and I haven't noticed a massive change. I would say, it appears to me that people are more connected, and slightly more aware of the news, which is due to a conjunction of the massive penetration of Internet, the social networks, and the improvement of the search. Google has an important part for sure, but again, for me it's not "a huge impact on humanity", like would be, say, the colonization of Mars or the end of the poverty (where Google search may or may not play a role).