WE live in an age of science and technology, so strictly speaking science should be able to forecast the future and help us make decisions better. But in this Age of Uncertainty, the best economic models did not predict the global financial crisis.
How did the ancients attempt to make better decisions? They relied on history, their own experience or oracles, astrology or mumbo-jumbo. In a situation of uncertainty, you make decisions on the basis of information that you have, and if don’t have that information, you simply have to consult someone or something you believe in.