So who are these people? Lets start with the some simple facts.
1. They are the 25 people who commissioned the 90 page report (hold up cover) that was published in 2000, entitled 'Rebuilding America's Defenses: Strategy, Forces and Resources for a New American Century', and signed its 1997 'Statement of Principles' (holdup page):
Elliott Abrams, Gary Bauer, William J. Bennett, Jeb Bush, Dick Cheney, Eliot A. Cohen, Midge Decter, Paula Dobriansky, Steve Forbes, Aaron Friedberg, Francis Fukuyama, Frank Gaffney, Fred C. Ikle, Donald Kagan, Zalmay Khalilzad, I. Lewis Libby, Norman Podhoretz, Dan Quayle, Peter W. Rodman, Stephen P. Rosen, Henry S. Rowen, Donald Rumsfeld, Vin Weber, George Weigel, Paul Wolfowitz
2. They are its Project Co-Chairmen: Donald Kagan and Gary Schmitt, and its principal author: Thomas Donnelly.
3. They are the 27 'project participants' - individuals who "participated in at least one project meeting or contributed a paper for discussion" - a list which includes Abram Shulsky, William Kristol, Paul Wolfowitz, and I. Lewis Libby:
[from REBUILDING AMERICA’S DEFENSES: Strategy, Forces and Resources For a New Century - A Report of The Project for the New American Century, September 2000, page 90]
4. They are the 133 signatories to the PNAC document (REBUILDING AMERICA’S DEFENSES) published in 2000. Here are the 133:
But the above lists are just the tip of the iceberg. There are countless others who were signatories to earlier drafts of the PNAC vision - the 1998 letter to Clinton, urging him to invade Iraq. And there were other similar letters written in 1996 and earlier. These precursors date back, as mentioned above, to Paul Wolfowitz 1992 'Defense Planning Guidance' document, which he authored as Undersecretary of Defense for Policy in the final days of the George HW Bush Administration.
Moreover, the principle PNAC architects not only came to play a central role in defining foreign policy for the George W. Bush administration, they were a tight-knit group that held key positions - often as Secretaries of Defense - in previous administrations: the George H.W. Bush Administration, the Reagan Administration, the Ford Administration, and the Nixon Administration. Their lineage can be traced back to the days immediately following the second World War, in which Paul Nitze - and other military hardliners who were the architects of the 'Cold War' - commandered foreign U.S. policy under the pretext of the threat of nuclear annihilation at the hands of the Soviet Union. To trace the careers and inter-relationships of the principle PNACers through the numerous administrations they served, it became necessary to map out each of the administrations in detail, and with chronologically accuracy in mind - so that questions about who was working with whom at what points in their careers could be answered definitively. Thus providing a framework against the backdrop of which the neocon lineage could be accurately mapped. The results (which were surprising) can be seen at: The Rest of the Iceberg.
In 1992, in the final days of that administration, he wrote a document called 'Defense Planning Guidance'. This document was not only a precursor to PNAC (200),  it was a tool for undermining Clinton foreign policy (see Clinton/TeamB) in much the same way that Ford's 'Team B', commissioned by George HW Bush (then-Director of the CIA under Reagan), undermined Carter's foreign policy. Wolfowitz was a member of 'Team B'(see: Ford/TeamB) along with Paul Nitze, his mentor. Both incidents were modeled on the way that Nitze had commandeered Truman foreign policy by writing National Security Memorandum # 68 (NSC-68)
The Rest of the Iceberg