The answer will come to you through good judgment and painful experience. You may be the only human being on the entire planet but you are not alone. Vicious predators will hunt you. A godillo with its huge arms will smash you if you get too close to its lair. Precious sources of food will run away from you if you are too noisy. In nature, it's the survival of the fittest and be sure even the smaller scavengers will come to get you if they smell you are already bleeding to death or in a bad shape.