Wilber
Ken Wilber - integral thinker. Wrote A Brief History of Everything
Ken Wilber shows us that although we all take different roads in life, we share a common direction in our development and evolution. He brings together a vast number of theories and observations and organizes them into one theory. It is quite amazing! Wilber has written many books on this subject but this is the one I would recommend people to read first. If you'd like a shorter, more simplified but extremely well-organized / well-articulated book that covers this material, I strongly suggest "The Ever-transcending Spirit" by Toru Sato. It also discusses practical implications of these ideas that make you feel like you could have saved a lot of hassle and confusion if you read it eariler in your life. Both Wilber and Sato are clearly two of the most advanced thinkers of our time
