17 April 1969
Dear Charles
I gave a talk to University College on 'The Social Impact of Biology' and the BBC subsequently broadcast a shortened version of it.  As I covered a very broad range of topics I decided not to publish it, and no manuscript exists as I spoke from notes.  As far as I remember I said that the biological evidence was that all men were not created equal, and it would not only be difficult to try to do this, but biologically undesirable.  As an aide I said that the evidence for the equality of different races did not really exist.  In fact, what little evidence there was suggested racial differences.
Had I enlarged on the subject I would have dwelt on the probable positive differences, such as, for example, the Jews and the Japs, rather than speak only about Negroes.  From what I hear you have bean saying something along these lines.  I would certainly love to see what you've written when you're satisfied with it.
F.H.C. Crick