Evolution of biological complexity in the context of "Inheritance of acquired characteristics"

Orthogenesis, also known as orthogenetic evolution, progressive evolution, evolutionary progress, or progressionism, is an obsolete biological hypothesis that organisms have an innate tendency to evolve in a definite direction towards some goal (teleology) due to some internal mechanism or "driving force". According to the theory, the largest-scale trends in evolution have an absolute goal such as increasing biological complexity. Prominent historical figures who have championed some form of evolutionary progress include Jean-Baptiste Lamarck, Pierre Teilhard de Chardin, and Henri Bergson.

The term orthogenesis was introduced by Wilhelm Haacke in 1893 and popularized by Theodor Eimer five years later. Proponents of orthogenesis had rejected the theory of natural selection as the organizing mechanism in evolution for a rectilinear (straight-line) model of directed evolution. With the emergence of the modern synthesis, in which genetics was integrated with evolution, orthogenesis and other alternatives to Darwinism were largely abandoned by biologists, but the notion that evolution represents progress is still widely shared; modern supporters include E. O. Wilson and Simon Conway Morris. The evolutionary biologist Ernst Mayr made the term effectively taboo in the journal Nature in 1948, by stating that it implied "some supernatural force". The American paleontologist George Gaylord Simpson (1953) attacked orthogenesis, linking it with vitalism by describing it as "the mysterious inner force". Despite this, many museum displays and textbook illustrations continue to give the impression that evolution is directed.

Richard Dawkins (born 26 March 1941) is a British evolutionary biologist, zoologist, science communicator and author. He is an emeritus fellow of New College, Oxford. In 1995 he was named the first Simonyi Professor for the Public Understanding of Science, a position he held until 2008, and is on the advisory board of the University of Austin. Dawkins has won several academic and writing awards, among them the 2005 Shakespeare Prize and the 2006 Lewis Thomas Prize. Presenting the latter, Paul Nurse said “In eloquent, evocative prose, Richard Dawkins conveys the certainty that, rather than diminishing the myriad beauties of the universe and extinguishing wonderment at its mysteries, science reveals truths that are yet more awe-inspiring than the mysteries they solve.”

Known as Darwin's Rottweiler, Dawkins has written a number of popular books explicating evolution. In The Selfish Gene (1976), he popularised the gene-centred view of evolution and coined the word meme. In The Blind Watchmaker (1986), he explains how the cumulative, non-random process of natural selection, coupled with random variation, creates complexity. In Climbing Mount Improbable (1996), he explores how evolution gradually creates complex adaptations through a series of intermediates. The book grew out of his Royal Institution Christmas Lectures, Growing Up in the Universe. With Yan Wong, he co-authored The Ancestor's Tale (2004), a “Chaucerian pilgrimage to the dawn of life.”