The Indians could not undertake any widespread cultivation of the plains not only because they lacked iron tools but also because they had no draft animals.
-- Ellsworth Huntington
   
Ellsworth Huntington   Name:
Ellsworth Huntington
Type:
Educator
Nationality:
none
Birth:
1876
Death:
1947
https://www.nutquote.com/quote/Ellsworth_Huntington