While I appreciate that most of the items on this list are important to one degree or another I don't think most of them are ESSENTIAL to a happy life. You can live without many things if you have to.. and still be happy. Thinking is on an altogether different plane of need, however. Thinking is where everything else begins. We shape our lives by thought. I don't think it would be possible to be happy to any degree at all if we couldn't think.