Natural Selection Is Not Evolution.

The Neutral Zone Of Selective Advantage In The Neighbourhood Of Zero Is Thus So Narrow That Changes In The Environment, And In The Genetic Constitution Of Species, Must Cause This Zone To Be Crossed And Perhaps Recrossed Relatively Rapidly In The Course Of Evolutionary Change, So That Many Possible Gene Substitutions May Have A Fluctuating History Of Advance And Regression Before The Final Balance Of Selective Advantage Is Determined.

However, Perhaps The Main Point Is That You Are Under No Obligation To Analyse Variance Into Its Parts If It Does Not Come Apart Easily, And Its Unwillingness To Do So Naturally Indicates That One's Line Of Approach Is Not Very Fruitful.

This Is Perhaps The Most Important Book On Evolutionary Genetics Ever Written

Natural Selection Is Not Evolution. Yet, Ever Since The Two Words Have Been In Common Use, The Theory Of Natural Selection Has Been Employed As A Convenient Abbreviation For The Theory Of Evolution By Means Of Natural Selection, Put Forward By Darwin And Wallace. This Has Had The Unfortunate Consequence That The Theory Of Natural Selection Itself Has Scarcely Ever, If Ever, Received Separate Consideration.

... The Actual And Physical Conduct Of An Experiment Must Govern The Statistical Procedure Of Its Interpretation.