Too bad Facebook was not around for most of history! Use the Fakebook tool to make a Facebook profile for a historical figure and make a fake tweet for the same character using the Twister tool. See for Abaraham Lincoln the example of a fake facebook profile and what he might have tweeted.
Make sure what you create is coherent with the person’s background, and explain what it might have meant for that person to use Facebook and twitter “way back then”. Include screen shots and links to what you created, and elaborate on what their use of social media might have been like if it existed for them.