I'm speaking from a human bio-diversity standpoint, which may be above your head. The vast majority of people who have ever lived have no descendants alive today. From a Darwinian perspective, they lost.
DNA research says you're wrong.
He's right, Mitochondrial Adam, and Eve would support that at one time (between 60,000 - 200,000 years ago) the population of Humanity dwindled down to just 1 Women, and 1 Man also at a different period.
This would suggest a huge die off around the time Humans formed.
This actually might have fueled Human evolution through genetic drift, where a set of hyper-selected traits for natural selection were pinpointed, with more primitive traits obviously weeded out.
Not just that, until recently, a lot of families saw multiple Kids die of treatable illnesses like the flu, who obviously didn't get to reproduce.