Audio version of web page: https://www.animal-ethics.org/wild-animal-suffering-matters/evolutionary-reasons-suffering-prevails-nature/

Natural selection works when different individuals come into existence  but only some of them survive, as there are not sufficient resources  available for everyone. Because of this, many individuals come into  existence only to die shortly after, and a reproductive strategy  maximizing the number of new individuals that are born may prevail for  evolutionary reasons, even if it entails that wild animal suffering and  premature death increase tremendously.