What is

the most important and revolutionary book ever written, be it religions, sciences, philosophies, economics and arts?

Why Tolerance?

Holiness, purity and charity are not the exclusive possessions of any church in the world, and that every system has produced men and women of the most exalted character. In the face of this evidence, if any body dreams of the exclusive survival of his own religion and the destruction of the others, I pity him from the bottom of my heart, and point out to him that upon the banner of every religion will soon be written, in spite of resistance : "Help and not Fight," "Assimilation and not Destruction," "Harmony and Peace and not Dissension."

-Swami Vivekananda,27th Sep,1893 at Chicago World Fair.