THE ROCKEFELLER INSTITUTE

FE
72 8 196g
A Graduate University and Research Center

NEW YORK 21, NEW YORK

February 26, 1963

Professor Joshua Lederberg
Department of Genetics
Stanford University
Stanford, California

Dear Joshua:

I am just back from a trip to South America.
I am most thankful to you for a copy of the "Biological

Future of Man". I have read it with the greatest interest.
I most certainly prefer your train of thought to Muller's. Ly
Many thanks and congratulations. cy
wy)

Sincerely,

I Hadi :

Theodosius Dobzhansky a.