>>17740961The 1930s and 1940s saw the professionalization of opinion polling. A lot of polling was done in the United States, particularly by Gallup, which was a fairly new institution at that time.
You also had large Army surveys, with hundreds of thousands of respondents, during WWII. Some researchers have taken to digitizing and analyzing the response forms. You can find their project at
https://americansoldierww2.org/For instance, you should check S32, particularly S32W ('White Form'), March 1943, sample size 12,234.
Q58.1 Do you think that after the war Negroes in this country should have more rights and privileges or less rights and privileges than they had before the war?
>Should have more rights and privileges 20%>Should have about the same 64%>Should have less 7%Q63.1 Do you think white and Negro soldiers should be in separate outfits or should they be together in the same outfits?
>They should be in separate outfits 87%>They should be together in the same outfits 3%>It doesn't make any difference 4% 
