  We demonstrate that many Naturalness tests of particle theories discussed in
the literature can be reformulated as straightforward algorithmic finetuning
assessments in the matching of Wilsonian effective theories above and below
particle mass thresholds. Implications of this EFT formulation of Wilsonian
Naturalness are discussed for several theories, including the Standard Model,
heavy singlet scalar theory, supersymmetry, Grand Unified Theories, twin Higgs
theories, and theories of extra dimensions. We argue that the Wilsonian
Naturalness algorithm presented here constitutes an unambiguous, a priori, and
meaningful test that the Standard Model passes and which "the next good theory"
of particle physics is very likely to pass.
