Pioneer Mother Movement, 1925-1940

Urbanization, immigration, and new roles for women caused widespread anxiety in the 1920s — anxiety that grew worse during the Great Depression of the 1930s. Americans embraced images of a self-sacrificing Pioneer Mother to reassure themselves of native-born white cultural dominance and promote traditional gender roles.

You can view monuments erected between 1925 and 1940 plotted on a map:

This data’s source.