Action Principle

The Action Principle, also known as the Principle of Least Action, is a concept in physics stating that systems evolve along a path that minimizes a quantity called "action," which depends on the system's motion and forces. Instead of following arbitrary trajectories, physical processes naturally select the most efficient route, balancing energy and time. Think of it as nature's way of choosing the smoothest or most economical path for things to happen, guiding everything from particles to planets in a consistent, elegant manner.