One of the claims Dennis Venema makes in his book is that the effective population size of our last common ancestor with chimps has never been fewer than 10,000.
You’ll forgive me for being a little bit jaded by now at news like this.
It looks like 2017 could become some kind of genuine annus horribilis for the established scientific consensus on human evolution.
There are conflicting evidences, a lack of details, opposing hypotheses held with great confidence, and a wide range of explanatory mechanisms that are routinely used as needed.
Research into human origins, we mean the entire field, is a mess.