: In complex systems like weather or economics, a tiny initial cause (the metaphorical flap of a butterfly's wings) can lead to vastly different outcomes over time. Why We Seek "The Why"

: As a result , consequently , therefore , thus , so . Cause and Effect Using Informational Text

The concept of "causes" is the engine of our reality, driving everything from the microscopic shift of a tectonic plate to the grand sweep of human history. Understanding what makes things happen allows us to predict the future and change the present. The Invisible Threads of Causality

: Identifying the cause of a disease is the first step toward a cure.

: A proximate cause is the immediate trigger—for example, a match lighting a fire. The ultimate cause is the deeper reason—why the oxygen, fuel, and heat were all in that place at that time.