Based on an academic article by the same author linked down-thread, the 100k year number is derived from when he thinks humans migrated from Africa. If you thin

Based on an academic article by the same author linked down-thread, the 100k year number is derived from when he thinks humans migrated from Africa. If you think that happened closer to 80kya (wiki estimate is around 60kya), I don't think that changes the fundamentals much.