The second law of thermodynamics states that the entropy of a closed system cannot decrease: “Every system, left to its own devices, always tends to move from order to disorder, its energy tending to be transformed into lower levels of availability (for work), ultimately becoming totally random and unavailable for work.” Author and scientist Isaac Asimov explained, “The universe is constantly getting more disorderly! . . . All we have to do is nothing, and everything deteriorates, collapses, breaks down, wears out, all by itself – and that is what the second law is all about.” In other words, over time, everything tends toward disorder, randomness, and disorganization.
Evolution demands that every physical system, from the atomic level on up, is the result of a spontaneous and increasingly complex and well-ordered process of assembly. Darwin suggested that living organisms, for instance, came about via a long string of infinitely complex, yet random, evolutionary processes. Such progression, however, would be in complete violation of the second law of thermodynamics. The trend, according to these physical laws, is that entropy is increasing, and thus natural processes must be breaking down, not building up (or evolving into something more complicated).