Immanuel Kant!
The categorical imperative theory was developed by German philosopher Immanuel Kant in his work "Groundwork of the Metaphysic of Morals." The theory is a moral principle that states one should act according to rules that could be universal laws.
command of sovereign sanctioned by punishments is law by imperative theory and law as legal science of norms is by pure theory of law.
The legal theory that laws should be made by a sovereign, and that by its definition law is the command of a sovereign, no one/thing else. The main exponant of the theory is Austin, although as a theory the imperative theory of law has been widely discredited, most notably by Hart. See article linked to below for further information: http://lawmatters.in/content/austin%E2%80%99s-imperative-theory-of-law-173
The author of 'theory of the earth' is James Hutton.
Richard Rohner has written: 'The artic imperative'
Susini. has written: 'Armed Struggle, A Strategic Imperative'
I think"Sorokin" or "lipsaid & benedict" is the author of that theory.
Charles M. Johnston has written: 'The Creative Imperative'
You mean the evolution theory? Darwin
Imperative
An example of an imperative sentence is "Please close the door." It is a command or request that tells someone to perform a specific action. Imperative sentences are characterized by the use of a verb in the base form without a subject.
imperative
You are very imperative.