  It is shown that, nonminimal coupling between the Standard Model (SM) Higgs
field and spacetime curvature, present already at the renormalizable level, can
be fine-tuned to stabilize the electroweak scale against power-law ultraviolet
divergences. The nonminimal coupling acts as an extrinsic stabilizer with no
effect on the loop structure of the SM, if gravity is classical. This novel
fine-tuning scheme, which could also be interpreted within Sakharov's induced
gravity approach, works neatly in extensions of the SM involving additional
Higgs fields or singlet scalars.
