How did Aristotle’s four causes explain why things exist or change?

In Aristotelianism, Aristotle identified four types of causes, or explanations, to account for why things exist or undergo change. These causes provide a framework for understanding the nature of reality and the processes of growth and development:123

• Material Cause: This refers to the physical substance out of which a thing is made, such as the bronze used to create a statue.14
• Formal Cause: This is the structure, essence, or pattern that a thing embodies, which defines what the object is.51
• Efficient Cause: This is the agent or origin of a change or state of rest, such as a sculptor carving a statue or a parent begetting a child.13
• Final Cause: This is the end, goal, or purpose for which a thing exists or is done.16

Aristotle believed that for living beings, the formal and final causes often coincide, as the mature realization of a natural form is the goal toward which an organism’s activities tend. By viewing change as the actualization of potentiality into a fully realized form, Aristotle emphasized a teleological approach, where understanding a thing requires knowing its purpose and function.13