When teaching sociology—particularly theory—we'll often hear about how most of the classic readings we assign are written by "dead white guys." And when you look through the canon it is, indeed, very pale and very male.
Few women are credited in shaping early sociology. Marianne Weber influenced her husband Max and Georg Simmel, and was a powerful sociologist in her own right. Harriet Martineau translated and edited Auguste Comte's famous Cours de Philosophi Positive so well that Comte preferred her version of his book over his own. Charlotte Perkins Gilman (of The Yellow Wallpaper fame) and Jane Addams both described themselves as sociologists, taught sociology courses, published articles in the American Journal of Sociology, and were charter members of the American Sociological Society (now called the American Sociological Association). Mary Jo Deegan writes on the exclusion of women in the American Sociological Society here.
Still, I think that it is completely fair to concede that classical sociological theory has a lot of "dead" and "guys."
What about that "white" part, though? Let's examine that more closely.