From caves to condos, from spears to spaceships, and from stone to electronic tablets, human beings have broken multiple barriers to pave the path of progress. Today, we are materially much more prosperous than we were a couple of centuries ago, but are we happier and more fulfilled? For many of us, the answer is a bewildering no. We often feel anxious and lost, as if living somebody else’s life. The author argues that the answer lies inside our minds, and ...