Found in 2 comments on Hacker News
tarsinge · 2024-09-19 · Original thread
"The Shareholder Value Myth" is an interesting book about companies purpose https://www.amazon.com/The-Shareholder-Value-Myth-Shareholde...
minimax · 2014-11-12 · Original thread
I'm not a lawyer, but I did just read a book† written by a lawyer†† about this topic. I think it's possible that it can vary state to state, but in Delaware (a very popular place to form corporations) the law††† says:

The business and affairs of every corporation organized under this chapter shall be managed by or under the direction of a board of directors, except as may be otherwise provided in this chapter or in its certificate of incorporation.

http://www.amazon.com/The-Shareholder-Value-Myth-Shareholder...

†† http://www.lawschool.cornell.edu/faculty/bio_lynn_stout.cfm

††† http://delcode.delaware.gov/title8/c001/sc04/index.shtml