The novels The Maze Runner and The 5th Wave both have the theme of survival. They both surround(focus on) a select group of kids that have leaders with big decisions to make. The Maze runner has to escape a "prison/test" to survive. In the 5th Wave the characters are trying to survive what they think is an alien invasion. Its set in a more apocalyptic setting.
You could do the phrase "Life, Liberty, and the pursuit of Happiness." These are obviously the unalienable rights guaranteed in the Declaration of Independence. For example, you could say something like "without these unalienable rights, the country would be just a mess." Hope this helps!
