How relevance is history?

Answer 1

It is always and unarguably relevant.

Unless you understand history, as a series of facts not "interpretations", you will not understand recent events, international relations etc. It also carries powerful warnings of what society generally must strive to avoid repeating.

A basic, broad knowledge of History also helps you understand cultural developments such as the Arts, and how people lived their daily lives in past centuries.

And of course it is a fascinating subject itself, simply from an academic and social point of view.