The central concept defining a technological society is technique. Technique is different from machines, technology, or procedures for attaining an end. "In our technological society, technique is the totality of methods rationally arrived at and having absolute efficiency (for a given stage of development) in every field of human activity."

Ellul argues that modern society is being dominated by technique, which he defines as a series of means that are established to achieve an end. Technique is ultimately focused on the concept of efficiency. The term "technique" is to be comprehended in its broadest possible meaning as it touches upon virtually all areas of life, including science, automation, but also politics and human relations.