Critical Facts
2. The drivers exert their influence at different time scales and intensities so the climate is never in equilibrium. Climate change is the norm.

Once you observe that the climate drivers operate at time scales that range from immediate, like an impact of a meteor, a volcanic explosion, or a change in the sun's intensity, to influences that change over millions of years, such as the slow drifting of the continents, you can understand why Earth's climate history is one of constant change