Song idea for a motivational speech?

For school, I have written a very moving and motivational speech that calls for action. I have the option of using music in the background of this speech.

What music do you think will best fit this theme. The speech calls for people to band together and it will give people goosebumps. So what music do you know of that will fit this vibe?

Do not worry if the music has lyrics or not, or what kind of music it is. I am really open to any ideas

EDIT: If you guys could link to a video or something that would be great!!!