Antonyms for the phrase "laying waste" could be "building up," "preserving," "protecting," "reconstructing," or "rehabilitating." Instead of destroying, these antonyms suggest creating, restoring, and nurturing. "Building up" implies growth and progress, while "preserving" and "protecting" pertain to the maintenance of something's current state. "Reconstructing" and "rehabilitating" both suggest repairing and improving something that has been damaged or neglected. Using language that emphasizes the opposite of destruction can help foster a more positive and constructive outlook on our actions and how they impact the world.