Of course I believe that. A baby conceived in the belly of a single teenage crack addict is unequal to a baby conceived by a middle class, married, well eductaed mother in the suburbs who takes care of herself and will receive proper medical attention throughout her pregnancy and afterwards for both herself and her child. Their chances of success in life, or even just living, are not equal.
In the western world a white blue eyed blond male, from a middle class family with a descent education will always have advantages over a woman or a person of colour. People wo are taller make more money than people who are shorter. The same for good looking people. Its just how life works. It is not necessarily fair or equal but that is life.