تکامل‌گرایی

Also known as evolutionary theory, evolutionary thought

thumb | right | alt=Monochrome photo of Charles Darwin, he appears to be an older middle aged man with a neutral expression, light skin, wrinkles under his deep set but fairly wide open eyes, and a chest length white beard extending up to his temples. He is wearing a hat with a rounded top, a medium width brim and a cloth band, his shoulders which are the only part of his body beyond head in frame seem are covered by a dark, apparently black, top of unclear cut. The background behind him is non-descript, possibly a plaster wall | Charles Darwin, whose [[On the Origin of Species introduced the