A New Species Develops If A Population

Living In An Entirely Different Physical As Well As Biotic Environment, Such A Population Would Have Unique Opportunities To Enter New Niches And To Select Novel Adaptive Pathways.

Wherever We Look At The Living Biota … Discontinuities Are Overwhelmingly Frequent…the Discontinuities Are Even More Striking In The Fossil Record. New Species Usually Appear In The Fossil Record Suddenly, Not Connected With Their Ancestors By A Series Of Intermediates.

Evolution Thus Is Merely Contingent On Certain Processes Articulated By Darwin: Variation And Selection.

There Are A Number Of Attributes Of Species And Populations That Are Not Of Any Particular Selective Advantage To Any Single Individual In A Population But That Are Of Great Advantage To The Population As A Whole.

The Most Consequential Change In Man's View Of The World, Of Living Nature And Of Himself Came With The Introduction, Over A Period Of Some 100 Years Beginning Only In The 18th Century, Of The Idea Of Change Itself, Of Change Over Periods Of Time: In A Word, Of Evolution.