Ask Vanguard founder John Bogle a question!

So it isn't every day that you get to ask an investment legend a question -- I would argue that Vanguard founder John Bogle has done more to help the small investor than everyone else in the history of the world combined times 10.

It really isn't even close. Index funds have enabled people saving for retirement to compound their money at a far, far better rate than they could before. Bogle's creation has allowed investors saving for retirement to let their money grow uninhibited, and cut off a stream of billions of dollars in undeserved management fees to poorly-performing mutual fund managers.

Tirade over. Fortune is giving readers an opportunity to submit a question to Mr. Bogle. A few hints: Don't ask him where the stock market is going. A cornerstone of his philosophy is his belief that it's nearly impossible to predict. Instead, ask him questions about public policy and corporate governance. Oh, and read his amazing and underrated book The Battle For the Soul of Capitalism.

I would ask him what he thinks about Social Security and whether it has a future in its current form. I would also want to know what he thinks about the huge improvements in corporate governance that have been achieved by activist hedge fund managers -- and whether enterprising investors might be able to find alpha by piggybacking off their picks.

There are literally hundreds of questions I could ask this legend -- I'm sure you have a few yourself.