Actualization is the concept of making something existent in reality.
Actualism is the belief that actuality and existence exist at the same time - that there is nothing beyond what can be seen.
An actualist is a person who believes in actualism, the belief that only actual things exist.
Actualism
The Theory of Actualism, which was put forward by Hutton, helped Charles Darwin in his research as he studied evolution of fossils. Darwin's work was also influenced by many other geologists apart from Hutton.