When I started reading this book I thought it was written after 9/11, I found very interesting a quote that indicates that is through fear how man's intelligence is destroyed, but Osho died in 1990.

The basic idea of this book is that you are born intelligent but society makes everything within its reach to turn you into a stupid and docile person, filling you with fear and greed. When your greed can't be satisfied in this world religion offers you heaven so you can have hope that your greed can be satisfied.

Osho proposes that its through meditation that you can recover your lost intelligence and be yourself again, be intelligent again.

The author deals with a complicated subject very simply. He gives
great credit to animals for the intuitive reasoning that they
possess in the conduct of daily life. According to Osho, intelligence is not per se subject to precise measurement.
In addition, there are conditions which impede intellectual
rationalizations and applications. For instance, great stress
can inhibit our ability to function meaningfully on the creative or intuitive level. The author gives credence to the notion that relaxation methodologies; such as, formal meditation
provide the requisite environment for the creative side of our
intelligence to flourish and grow. The book provides a fresh
perspective on what constitutes intelligence and creativity.
It would be appealing to a wide constituency of readers in
business, academe and the general readership.
It is a good value for the price charged.