To Kill Cow Means To End Human Civilization

The term sacred cow finds its origin in the ancient Vedic tradition, dating back to thousands of years. What really prompted these folks to revere and worship the cows? Were they really so stupid as to worship an animal? Are we really that smart now to ridicule their idea? Why didn't they propose to worship any other animal like tiger, dog or monkey.
This book delineates various aspects of cow sciences as presented by the voice of an old civilization, Vedas.