[W]ell, look at each discipline as a set of criticisms than any theory has to survive scrutiny.
A unit of measure, or method of comparison, might be informative inside of a particular discipline, but meaningless across disciplines (happiness for example makes no sense in mathematics, yet at least basic mathematics makes sense in experimental psychology).
Propertarianism not only survives criticism in each discipline but renders all disciplines commensurable – sort of how money and prices make the value
of all goods commensurable.
So one might attempt, falsely, to justify propertarianism and testimonialism as true, or one might say, that given it survives application to all these different fields, and unites these fields, survives as a truth candidate until a superior truth candidate comes along.
Unifying Biology, Psychology, Sociology, Morality, Law, Economics and Philosophy is no small thing. It’s a very important thing.
And yes, it’s a bit hard to learn critical rationalism, testimonialism, propertarianism, propertarian institutions, and propertarian legal construction. But it’s equally hard to learn many other disciplines.
But all investments provide returns or not.
The fact that propertarianism and testimonialism provide such broad explanatory power, survives application in all fields, provides commensurability across all fields, is enough, hopefully, for some of us to invest in this discipline versus some different discipline.
The Philosophy of Aristocracy
The Propertarian Institute