If similar effects follow fundamentally similar moves in conditions which vary widely in nature s

“If similar effects follow fundamentally similar moves, in conditions which vary widely in nature, scale, and date, there is clearly an underlying connection from which we can logically deduce a common cause. And the more widely the conditions vary, the firmer is this deduction.”

Liddell Hart, Basil Henry, and Basil Henry Liddell Hart. Strategy. 2nd rev. ed, Meridian, 1991 p. 30.

Distillation of universal principles can be achieved, also, by examining the deductions of diverse military thinkers throughout different historical and technological contexts.