On what basis do you say this? You'll forgive me if I don't take your word for it.
There have been many take into account all that would have to happen [snip]
An honest answer can be given in a single paragraph. It would take the form of "The probability that
H. sapiens, or a species of equivalent intelligence and ability, could evolve from its precursors on the hominid line over the course of roughly 2 million years is found by considering the number of such possible lines of evolution X, with the probability P of any one of them being determined by the number of beneficial mutations Q that would have to take place during that time, each having a probability of N, so that the final probability is (N^Q); and the probability that one or another human-like species would evolve over that time being equal to 1-(1-P^X)."
Put this in your own words, briefly, to show that you actually have a clue what you're talking about and aren't just cutting and pasting words that you don't really understand. Do not resort to a blizzard of verbiage; I'm onto that game, thanks.
In the meantime, reflect on the fact that this is actually likely to be a fairly large probability, as X is likely a very large number; that is, there were in fact a near-infinite number of highly intelligent, social, tool-using species that could have evolved from the hominid line, so that, while the chance of any ONE of them evolving was small, the chance that ONE OR ANOTHER would evolve was in fact pretty substantial.
In any case, as I said, anyone can cut and paste without comprehension. If you want your claims to be taken seriously, post them in your own words to show that you know what the hell you're talking about.