How do you think personal relationships would change if people could read minds?
The human species would last about a week. People would kill each other over thoughts, breeding would come to a screeching halt (you want to do WHAT to my mother?!?!?!), and most friendships would suffer, if not dissolve. I don't want to read anyone's mind, and I don't want anyone to read mine. Thoughts are really the only 100% private things you can have, and people would be shocked if they could read the thoughts of others, even those closest to them. Now, if mind-reading came with privacy settings, it might be a different story, but reading minds would have a terrible impact on the species.