Describe a societal or cultural change between the early 20th century to the mid-20th century, which affected historians interpretation of the nature of slavery in America?

it proved indian land claims were unjustified.

depending on what kind of map for example a pltical maps works in many ways this iss how it works it shows the areas and places the democratics and the repbulcicans reside for example if   texas chooses trump for president there a republican state and if   califronia chooses hillary there a democratic state.

i'd rather watch halloween but ok