dynamism

Concise Oxford English Dictionary © 2008 Oxford University Press:
dynamism/ˈdʌɪnəmɪzəm/

▶noun

• 1 the quality of being dynamic.

• 2 Philosophy, chiefly historical the theory that phenomena can be explained by an immanent force.

– derivatives
dynamist noun,
dynamization (or dynamisation) noun,
dynamize (or dynamise) verb.