Matthew,
First, please note that I am not a very knowledgeable person about Objectivism. Such a person would be someone like Harry Binswanger or Leonard Peikoff and a few others (more and more as time passes).
Can I now forecast accurately how much time would be required to write a complete list of every element – concept, principle, theory, branch – of Ayn Rand’s philosophy? No, not accurately, if that means close enough to sign a contract and do the work for pay.
However. I can offer an informed guesstimate (based on years of estimating writing, editing, and other publication projects). I would say: Several thousand hours, in other words, a full “man year.” The project would be huge, if it is to be complete in its first draft. Leonard Peikoff’s Objectivism: The Philosophy of Ayn Rand presents (in Dr. Peikoff’s interpretation) a selection of the elements of her philosophy he considers most important for a single-volume presentation. But of course there are many other elements, for example, in her epistemology, that he doesn’t discuss.
Writing a list would be easier than writing a coherent book (because the issue of presentation would be minimal), but it would still take thousands of hours of labor, at least.
If the moderators, as a general rule, have trouble deciding whether X is or is not an element of Objectivism, and if they really need a list (which I doubt), then why not build the list incrementally? You could start with the most obvious – and most frequent! – issues (they keep coming up again and again), and list them in hierarchical order, perhaps initially by branches (as major headings).
An example, perhaps under Epistemology (or even Theory of Man), would be:
“Consciousness is volitional. For the New Intellectual, p. 155 [hb], 127 [pb].”
A moderator can then see that determinism (which denies choice in human consciousness) contradicts this element and is therefore non-Objectvist. It is really that simple. However, possibly as an aid to efficiency in judgment, the list of elements might state negatives for each element of Objectivism. For example:
“Objectivism rejects determinism. Leonard Peikoff, ‘The Philosophy of Objectivism’, Lecture 1, as transcribed in ‘Determinism’, The Ayn Rand Lexicon, p. 122.”
I am willing to wager that additions to the list will drop off very quickly after the first few months.
In addition to such a “living” list, there should be an ever-growing list of all the forms of indirect attacks on Ayn Rand as well as on her philosophy. An example is the bizarre notion that she was writing her novels as mental-health manuals (with John Galt as psychotherapist and Dagny Taggart as patient).
P. S. – Under certain conditions (which we should discuss privately), I would be willing to manage and write such a list. Some elements would need discussion before inclusion. I see that as good for students of Objectivism, including me, because it focuses on the philosophy which is the foundation of this forum.