Steve Taylors book “Back to sanity” is one you should read. It helps you open your mind to the following:
Have you ever thought that there might be something wrong with human beings, even that we might be slightly insane? Why is it that so many human beings are filled with a restless discontent, and an insatiable desire for material goods, status and power? Why is it that human history has been filled with endless conflict, oppression and inequality?
Visit his website if you want to read more