What does it mean to say that there are different public’s that make up public opinion

What is zinn's approach to the study of history? what does he suggest occurs when history is told is the story of human progress?

Why were colonial assemblies created and what did they do

The 15th amendment to the u. s. constitution, ratified in 1870, deals with what issue? a. prohibition of alcohol b. voting c. declaring war d. free speech