The meeting went on for hours, never quite erupting into complete disorder.

At this period of history the city was in complete disorder.

Why is it not in a state of complete disorder at all times?

In that case, the universe would already be in a state of complete disorder, so disorder could not increase with time.

The universe would be in a state of almost complete disorder.

What you have is virtually pure entropy-that is, complete disorder.

Otherwise, it would by now have degenerated into a state of complete disorder, in which everything would be at the same temperature.

The Professor's room had been left in complete disorder.

Disorder couldn't increase much because the universe would be in a state of almost complete disorder already.

Several years previous, the wealthy Adonian had died, leaving his extensive and complicated financial affairs in complete disorder.