In 1995, the National Association of Biology Teachers (NABT) passed a resolution promoting this slogan:
"The diversity of life on earth is the outcome of evolution: an unsupervised, impersonal, unpredictable, and natural process of temporal descent with genetic modification that is affected by natural selection, chance, historical contingencies, and changing environments."
The ASA (and others) took issue with this statement – successfully.
In 1997, the NABT deleted the two words in red from the definition.
The definition is now no longer tied to philosophical naturalism. Some philosophical naturalists, Richard Dawkins and Massimo Pigliucci among them, are not pleased with this. Others, such as Eugenie Scott, supported the change.