 In considering this form of social construction, or we might call it social constitution, it is important to note that social kinds cannot be equated with things that have social causes. Sociobiologists claim that some social phenomena have biological causes; some feminists claim that anatomical phenomena have social causes, e.g., the gap in average height and strength differences between men and women in a particular context depends on, among other things, gender norms in that context concerning food and  exercise.[5]  As Ruth Hubbard explains,