American Biologist Quotes
While our view of the world is filtered through our senses, evolution has, by and large, molded those senses to perceive the world accurately, for there's a severe penalty to be paid for seeing things wrongly. That holds not only for the external environment, but also for the character of others. Without accurate perceptions, we couldn't find food, avoid predators and other dangers, or form harmonious social groups. And following those perceptions is indeed the pursuit of true beliefs : beliefs based on evidence. Natural selection doesn't mold true beliefs; it molds the sensory and neural apparatus that, in general, promotes the formation of true beliefs. General systems theory is a series of related definitions, assumptions, and postulates about all levels of systems from atomic particles through atoms, molecules, crystals, viruses, cells, organs, individuals, small groups, societies, planets, solar systems, and galaxies. General behavior systems theory is a subcategory of such theory, dealing with living systems, extending roughly from viruses through societies. A significant fact about living things is that they are open systems, with important inputs and outputs. Laws which apply to them differ from those applying to relatively closed systems.