That's not nature. Survival of the fittest doesn't apply in that sense to us, because we as a society also feed the people who wouldn't survive in a x vs nature scenario. Disabled for example. So poverty in the presence of abundance of food and shelter isn't "survival of the fittest" it's choice by the society not to help. To look away. To let die. For no gain at all. Neither for your own, your communitiy's or your species's.Humans are animals, google " survival of the fittest" and it will become clear, what this world is built on.
Not in areas where isn't abundance, that is.