  Gassendi's influence spread further still, beyond Britain or the modern era. The young Leibniz consciously followed Gassendi in embracing atomism, later retaining high regard for mechanism but abandoning the material model of substance in favor of the monadology (Moll 1982). Christiaan Huygens pursued numerous Gassendist themes, including anti-Aristotelianism, probabilism, a method of hypothesis, and atomist matter theory. Gassendi's libertine, atomist, empiricist, and quasi-heliocentrist views also met with keen interest further afield, among like-minded philosophers and natural scientists in early modern Poland, Italy, and Spain (Murr, 1997). In more recent times, Gassendi would come to be seen as anticipating such notable views as Mill's proposal that mathematical knowledge is empirical, and Popper's notion that empirical falsifiability is a test of a hypothesis' prima facie viability.