"Avengers: Infinity War" isn't just a summer smash hit, but also a movie with deep parallels to ethical questions faced by modern society. Marvel has been laying the groundwork to "Infinity War" for a decade, and has now introduced one of the greatest comics villain of all time: Thanos, who seeks to kill half the population of the universe.
And in their struggle against Thanos, the Avengers present a worldview consistent with Catholic teaching: that even a single life is worth fighting for.