Authority emerges from a history of successful influential communications. [causal]
Authority is created on the basis of a differentiation of probabilities as a result of previous action. If influential communications have, for whatever reasons, always been successful, there emerge expectations which strengthen this probability, facilitate new attempts, and make rejection more difficult. After a period of untroubled acceptance, rejection causes surprise, disappointment, unforeseeable consequences and thus requires special reasons. And, vice versa, authority does not need to be justified initially. One could say that it is based on tradition, but does not need to invoke tradition.
DEFINE: Explains authority as a probabilistic expectation built from prior successes rather than any intrinsic right or initial justification.
Niklas Luhmann, Trust and Power, loc. 735