Darwin dating joke
If even one part is missing, the entire system will fail to function.  Thus, such a system could not have evolved slowly, piece by piece.The common mousetrap is an everyday non-biological example of irreducible complexity.The eye, the ear and the heart are all examples of irreducible complexity, though they were not recognized as such in Darwin's day.
55), and "If there is bliss on earth, that is it" (quoted in Browne, p. He even declared: "My zeal was so great that I used to place my shooting boots open by my bed-side when I went to bed, so as not to lose half-a-minute in putting them on in the morning" (p. By 1828, his ambitions for killing animals had outgrown his equipment.
Darwin wrote, "…Natural selection acts only by taking advantage of slight successive variations; she can never take a great and sudden leap, but must advance by short and sure, though slow steps."  Thus, Darwin conceded that, "If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down."  Such a complex organ would be known as an "irreducibly complex system".
An irreducibly complex system is one composed of multiple parts, all of which are necessary for the system to function.
Ancient Greek philosophers such as Anaximander postulated the development of life from non-life and the evolutionary descent of man from animal.
Charles Darwin simply brought something new to the old philosophy -- a plausible mechanism called "natural selection." Natural selection acts to preserve and accumulate minor advantageous genetic mutations.