Human beings compare because that is our nature... it's how our brain works. We set up a "pecking order" in everything we do, it seems. Whether we use wisdom in this or stop being so attached to our comparisons is up to us. We cause so many of our own problems and suffering due to our fear and insecurities.
Even if there was no ranking system, we would "rank" each other anyway. Instead of getting rid of rank, we should learn to deal with our own "stuff".