A song that takes on a social issue of our times

Can you think of a song that takes on a social issue of our times?
Write an initial post in which you:

indicate the title of the song
the performer(s)
whether there are various versions of it
how you see it calling people to action/adventure
and indicate at least one rhetorical strategy that we have been discussing (such as ethos, pathos, logos, metaphors, similes, or rhetorical questions) and quote lyrics that illustrate the strategy.
Finally, add a link to the song at the top of your initial post.