What is nietzsche's will to power?

Nietzsche's "will to power" is a metaphysical concept which was created to oppose Schopenhauer's theory of "will to live" and Darwin's evolution theory. Nietzsche thought that all the animals and other organic things, including humans, didn't just try to stay safe and alive all the time but they took many risks that could cost their lives like waging a war. "Will to power" is individual's desire to expose its influence or desire to release its internal energy; exposing influence is seen when a stronger individual subordinates a weaker one, and releasing internal energy is displayed e.g. in art. According to Nietzsche, all the active force's of universe can be reduced to "will to power" including moral which was created to build up a society where the creators of the moral themselves were the ruling class.