If everyone had equal opportunities, this sort of dumb, naive idealism might hold some credence. As it is, people are extremely unequal in absolute terms. This is not because of genetics though, as human genetics are relatively equal between all people. This is because of the nurture (environmental factors) which have some people born in rich countries and others in poor, some people born in the working class with little access to nutritious food & education while others are born into the capitalist class and have every advantage and every opportunity handed to them on a silver platter.