Magic, or illusion as those in the trade call it, is an ancient art form.
At one time, magic was used to manage life, much like technology is today. Take the burial of cave bears by European tribes 50,000 years ago. This was likely tribal spell work -- bury the bear and he can't bury you.
Today, people are far more pragmatic. Thanks to special effects and modern technology, we know the magicians we watch on television and in concert are not actually rending the laws of space and time. They are, rather, illusionists.