I’m a Research Fellow at Open Philanthropy, though all views I express here are my own.
Before OP I was an independent researcher in global health and biosecurity, and a Charity Entrepreneurship incubatee. I have an MD and undergrad degrees in philosophy, international relations, and neuroscience, all from the University of Sydney.
One might distinguish de jure openness (“We let everyone in!”) with de facto (“We attract X subgroups, and repel Y!”). The homogeneity and narrowness of the recent conference might suggest the former approach has not been successful at intellectual openness.