The Valley of Ignorance

Happily lived Mankind in the peaceful Valley of Ignorance.

To the north, to the south, to the west and to the east stretched the ridges of the Hills Everlasting.

A little stream of Knowledge trickled slowly through a deep worn gully.

It came out of the Mountains of the Past.

It lost itself in the Marshes of the Future.

This is from the prologue of Tolerance by Hendrik Willem van Loon. In this book the author argues that human progress and peace depend on learning to live with our differences.​

The Dutch‑American historian and journalist was right. Tolerance is needed for survival.