The value of using data to make rational and accurate decisions is not new. From generals to great fictional detectives, people have relied on data to make the right decision and find the answer. Just in the same way businesses have been doing it for the past century.
Even before data science was a term or the words data-driven decisions flew through every boardroom. Using data to make better good choices and rational decisions existed. Why? Because it works. With the power of increased computing and easy to use analytical programming libraries analyzing massive amounts of data just got that much easier.