After World War I, how did new theories about science differ from past ideas?

Before World War I, many people believed science could discover clear, universal laws that fully explained how the world worked. New ideas such as quantum theory challenged that certainty, showing that some events could only be described in terms of probabilities and that explanations had limits. So the best answer is that new theories recognized that explanations were not always possible.

AI-written and checked against the verified answer.