Why, at age 66, is Greg Norman leading another charge to challenge the PGA Tour?

Along with an ability to drive a golf ball better than anyone with a persimmon club, Greg Norman had a keen awareness of his own worth as a golfer, especially as it applied to securing fees for his participation.

Norman makes no secret of this. The Australian golfer who earned the nickname the “Great White Shark” and suffered heartbreak along with an abundance of success throughout a Hall of Fame career knew that the best golf in the world was being played on the PGA Tour in the United States.

But he also saw opportunity beyond the tour’s borders, and always wanted to explore them. Starting in 1984, when he played his first full season on the PGA Tour and won his first tournament at the Kemper Open, he always wondered why his ability to play around the world came with stipulations.

As a member of the PGA Tour, he had rules to adhere to and permissions to obtain. And to this day … it bugs him.

“It still frustrated me to death why, as an independent contractor, I couldn’t get out there and expand on my true market value that I truly believe I had,” Norman said. “Same with all the other players.”

And here we are.

Nearly 30 years after Norman first attempted to start a rival tour that would bring the best players together at venues around the world for guaranteed money and lucrative purses, he is now the commissioner of an upstart league that has yet to be publicly named but is busy behind the scenes working to secure people in leadership roles and several players — who, if signed — would give the venture credibility.

Having been anointed the CEO of this new venture called LIV Golf Investments, Norman unveiled a limited amount of plans last week.

How this plays out over the following weeks and months will be fascinating to follow, but Norman’s role is instructive. He — along with the late Seve Ballesteros — battled the PGA Tour’s hierarchy in the early 1980s. Norman sought — with the help of Fox Sports — to launch a World Tour in 1994 that was eventually thwarted by…