At https://phys.org/news/2026-06-human-evolution-messy-gradual-abrupt.html … is quite a good summary of an article published in Quaternary Science Reviews which can be viewed or downloaded – see https://doi.org/10.1016/j.quascirev.2026.109981 … It is generally accepted by mainstream that modern humans originated in Africa and dispersed worldwide – and other earlier forms of humanity went extinct. It is an axiom that fits in nicely with modern political ideas in the West. Yet, how, or even when, humans dispersed Out of Africa is still debated. This article begins by asking if it was the abrupt event so loved by mainstream archaeologists. It doesn’t examine the politics or the way the thinking has pervaded other disciplines. As he is an archaeologist and they are the people who come across the skulls and bones of early humans, that is who he addresses.
Archaeologist Huw Groucutt argues that the ideas surrounding modernity and a ‘human revolution’ arise more from bias and cherry picking evidence rather than from the available data open to them. Seems like some people are prepared to raise their heads above the consensus view and look at things more honestly. After reviewing fossil, genetic, and archaeological data and findings, he says that anatomical and behavioural modernity developed in a mosaic. Regionally gradual and variable.
The idea, he suggests, came about by the lure of abrupt change in ‘palaeo-archaeology’, the so called Upper Palaeolithic Revolution. A semi sudden cognitive and genetic switch-on dated roughly 50,000 years ago. A nice round figure. Proponents went on to argue that a sudden brain re-organisation triggered the Out of Africa expansion.Quite where in Africa this occurred has not been tied down. They assumed the changes were associated with the appearance of cave art and rock art, complex tools, and organised social structures that were supposed to have originated at that point in time, or shortly thereafter. Yet, many archaeologists, he says, have moved away from this position because it conflicts with the actual evidence that has been unearthed. Recent research indicates complex behaviour and anatomical features were changing across Africa much earlier. Genetic studies reveal multiple dispersals and admixture events.
Groucutt also says that interpretations within palaeo-archaeology are still strongly influenced by the notion of revolution – or a sudden light bulb moment in human evolution. My words. I imagine this change in thinking by Groucutt is the result of claimed modernity in anatomy in skulls from North Africa and elsewhere, dating from as early as 200,000 years ago. That idea appears to be based on skull shape, which is not conclusive I would have thought. However, Groucutt also says that many dating methods carry huge uncertainties. This might question mainstream even further, in a fundamental manner. Groucutt’s thrust in the online article itself is that humans adopted modernity gradually – over a long period of time. He is therefore embracing these early dates – from various locations in the Levant and Africa. He has no choice. Groucutt also says the idea of a genetic mutation leading to modernisation is an idea that has mostly died out. Interesting point. He says no evidence has ever been found to support it. Instead, genetic data indicates a long and complex process of change in the evolution of humans.
Seems like it is still all up for grabs. It is interesting to go back to earlier seekers of human origins – back into the 19th and early 20th centuries. It was euro-centric. Neanderthals lived before Cro-Magnon man, prior to the Upper Palaeolithic, and they were regarded by early European researchers as grunts. There was no real reason for thinking that but it suited the in vogue idea of evolution in stages. Museums had displays showing apes at the beginning and various other hominims between them and modern humans. Culminating in the advanced Victorian gentleman. Nowadays we can see this was clearly bias on the part of the skull hunters – and plenty of words have been written on their nefarious interpretations. Modern science has now shown there was little difference between the cognitive abilities of Neanderthals and those of modern humans. Neanderthals also clearly had language. They could communicate with each other in words rather than grunts. All these findings lie at the root of Groucutt’s analysis. Has Groucutt gone far enough? He has openly made the first swipe in academia at the idea of Out of Africa 50,000 – or even 100,000 years ago. There were probably radical historians and scientists who have said the same thing but they have been ignored. This effort is published in a serious journal with a good reputation. However, the Chinese, not held back by western bottlenecks such as the Bible and antipathy towards it, have been saying for a very long time that humana evolution was much more complex than the simple Out of Africa theory concocted in the West.
Reading the article itself it becomes evident I am not conversant with all the arguments invented to account for Out of Africa but I certainly like the way he deconstructs the current South African research that claims modern humans evolved there and spread around the world’s sea ways. Somebody did need to say that. I hadn’t realised that it is supposed to have occurred within a single generation. Now, that would be evidence of mutation.
Another major problem, and the biggest one, is that skulls and bones of earlier human species are usually turned up in cave sediments or buried as a result of catastrophic events such as tectonic upheavals in the East African rift valley. There is no layer or strata archaeologists can dig into, unlike more recent archaeology. We don’t know what happened between one catastrophic event and the next. One can suppose mutation played a role but have the earlier forms of humanity, such as Homo erectus, been fully evaluated in the way Neanderthals have in recent years. The skeletal evidence is meagre to say the least, and fragmentary – yet it has spawned big ideas. Mountains made out of mole hills.