Building A Better Mousetrap Merely Results In

With Highly Civilised Nations Continued Progress Depends In A Subordinate Degree On Natural Selection; For Such Nations Do Not Supplant And Exterminate One Another As Do Savage Tribes.

It Is So Easy To Hide Our Ignorance Under Such Expressions As The Plan Of Creation Or Unity Of Design, Etc., And To Think That We Give An Explanation When We Only Restate A Fact.

It Strikes Me That All Our Knowledge About The Structure Of Our Earth Is Very Much Like What An Old Hen Would Know Of The Hundred-acre Field In A Corner Of Which She Is Scratching.

Nothing Exists For Itself Alone, But Only In Relation To Other Forms Of Life

Extinction Has Only Separated Groups: It Has By No Means Made Them; For If Every Form Which Has Ever Lived On This Earth Were Suddenly To Reappear, Though It Would Be Quite Impossible To Give Definitions By Which Each Group Could Be Distinguished From Other Groups, As All Would Blend Together By Steps As Fine As Those Between The Finest Existing Varieties, Nevertheless A Natural Classification, Or At Least A Natural Arrangement, Would Be Possible.