This
article by Robert Tracinski covers the "four cornerstones of the mainstream or ‘orthodox’
school of Objectivism that formed in the 1980s after Ayn Rand’s death. These
propositions, having to do with the nature of Objectivism as a philosophy and
how it should be organized as a movement, were solidified between 1985 and 1989
and articulated by Leonard Peikoff and by Peter Schwartz, with Peikoff’s
approval and support. All of them are now coming crashing down in one way or
another." The 1980s Called, and They Want
Their Objectivism Back | The Tracinski Letter
While I think he is a bit harsh on the Brandens,
Barbara in particular, I agree with his overall take on the continuing schisms
and purges that plague the Objectivist world.