sort of thing only darkens counsel.
If a theory is right, it can be pushed to its logical conclusion; indeed, the only real test of its value is that it can be pushed to its logical conclusion. If it is wrong in practice, it is wrong in theory, for the right theory will take cognizance of all the facts, not only of one set.
In Chapter II. of this part (pp. 186-192), I have very broadly indicated the process by which the employment of physical force in the affairs of the world has been a constantly diminishing factor since the day that primitive man killed his fellow-man in order to eat him. Yet throughout the whole process the employment of force has been an integral part of progress, until even to-day in the most advanced nations force—the police-force—is an integral part of their civilization.
What, then, is the principle determining the advantageous and the disadvantageous employment of force?
Preceding the outline sketch just referred to is another sketch indicating the real biological law of man's survival and advance; the key to that law is found in co-operation between men and struggle with nature. Mankind as a whole is the organism which needs to co-ordinate its parts in order to insure greater vitality by better adaptation to its environment.
Here, then, we get the key: force employed to secure completer co-operation between the parts, to facilitate exchange, makes for advance; force which runs counter to such co-operation, which attempts to replace the mutual benefit of exchange by compulsion, which is in any way a form of parasitism, makes for retrogression.
Why is the employment of force by the police justified? Because