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Ok there is a number of them. IECite the research from their papers which proves that mainstream evolutionary theory asserts that natural selection is the only cause of evolution.
For biologists schooled in population genetic or quantitative genetic thinking, the starting point for evolutionary analyses is the selection pressures [94].
A widely accepted definition of evolution is change in the genetic composition of populations, which, to many evolutionary biologists, restrict evolutionary processes to those that directly change gene frequencies—natural selection, drift, gene flow, and mutation.
Contemporary evolutionary biology textbooks support this interpretation (see the electronic supplementary material, table S1). Only selection, drift, gene flow, and mutation are consistently described as evolutionary processes, and coverage of developmental bias, plasticity, inclusive inheritance, and niche construction is at best modest (e.g. [95]) and, more commonly, absent [96,97]. What coverage does occur is typically given the traditional interpretation outlined above.
http://rspb.royalsocietypublishing.org/content/282/1813/20151019
The Modern Synthesis (MS) emerged in the first half of the twentieth century, with the integration of Darwinian natural selection, population-level thinking and Mendelian inheritance, and has provided the dominant conceptual framework for evolutionary biology [4,5]. It is rightly regarded as one of the major achievements of biology and led to the widespread adoption of several core assumptions [6] (table 1). These include: natural selection is the sole explanation for adaptation;
https://royalsocietypublishing.org/doi/10.1098/rspb.2015.1019
The familiar representation – the one we find in textbooks – is the genetic theory of evolution by natural selection.
The standard response at this stage is to point out that any adaptive directionality in evolution caused by plasticity, niche construction, and extra-genetic inheritance can, in fact, be explained by natural selection in the past. How else could something like niche construction improve the fit between organism and environment? This response views causation according to Mayr’s proximate-ultimate distinction. Natural selection is viewed an ultimate cause, responsible for the adaptive fit between organism and environment.
How do living beings fulfil the conditions for evolution by natural selection? – Extended Evolutionary Synthesis
The above also talks about natural selection (adaptations) as being 'Lewontin’s conditions affects what counts as an evolutionary explanation'. So only natural selection is recognized as the forces that adapt variations to environments according to Lewontin and Mayr who are both prominent supporters of the MS.
The above is pointing out that according to Pievani also a prominent MS supporter the core of evolution is the genetic population theory of natural selection. This is based on gradualism and adaptationism.
The following paper is probably the best for showing how natural selection (adaptionism by NS) is made the prominent cause of evolution. But also how despite claims that classical evolution has included the new influences in the way the EES views evolution they still basically retain the same view as the MS in that evolution change only comes through random gene change and adaptive variations are determined by natural selection alone that directs evolution.
Even though claims have been made that classical evolutionary biology has continuously incorporated aspects from new conceptual domains [33,36], the majority of tenets and explanations that appear in characterizations of the current theory are still derived from the MS account and its population genetic principles [37].
In a condensed form, these tenets are as follows: (i) all evolutionary explanation requires the study of populations of organisms; (ii) populations contain genetic variation that arises randomly from mutation and recombination; (iii) populations evolve by changes in gene frequency brought about by natural selection, gene flow and drift; (iv) genetic variants generate slight phenotypic effects and the resulting phenotypic variation is gradual and continuous; (v) genetic inheritance alone accounts for the transmission of selectable variation; (vi) new species arise by a prevention of gene flow between populations that evolve differently; (vii) the phenotypic differences that distinguish higher taxa result from the incremental accumulation of genetic variation; (viii) natural selection represents the only directional factor in evolution. For a more extensive description of tenets see Futuyma [37].
As can be noted from the listed principles, current evolutionary theory is predominantly oriented towards a genetic explanation of variation, and, except for some minor semantic modifications, this has not changed over the past seven or eight decades. Whatever lip service is paid to taking into account other factors than those traditionally accepted, we find that the theory, as presented in extant writings, concentrates on a limited set of evolutionary explananda, excluding the majority of those mentioned among the explanatory goals above.
Connected with the gradualist requirement of the MS theory is the deeply entrenched notion of adaptation. Again, we are confronted with a feature of the classical theory that has been criticized repeatedly in the past, both on empirical and theoretical grounds [30,41] but also on the basis of modern results of genetics [22].
the notion most frequently encountered is still that of a collection of features that make up the organism, each one individually adapted to performing a function in the way best suited for the organism's survival, a picture that has been described as ‘bundles of discrete adaptations.’ This view was neither eliminated by Dobzhansky's alternative view, in which he interpreted populations as states of relative adaptedness [30], nor by the demonstration of the frequent occurrence of non-adaptive traits.
And here's how it ties in natural selection as the sole force but how this has been the subject of criticism. So therefore it seems to be a well-known contention which I have mentioned before (Gould) for example questioning NS being made the cause of all evolutionary change.
Natural selection, the cornerstone of the MS theory so intimately linked to both gradualism and adaptationism, has itself been the subject of a fair share of critical debate. In this case, it is not so much the principle itself that is contested, but the uniqueness of the causal agency that has been ascribed to it.
Again we are confronted with a classical criticism that stood at the centre of multiple debates in the past [42], but the issue is as unresolved as ever.
Why an extended evolutionary synthesis is necessary
In other words how it is made the sole force for adaptive evolution.
There are many more so all these authors of peer-reviewed papers cannot be lying or using hyperbole as you say.
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