  The static local-field factor (LFF) of the interacting 2-D fluid is
calculated nonperturbatively using a mapping of the quantum fluid to a
classical Coulomb fluid [Phys. Rev. Let., {\bf 87}, 206 (2002)]. The LFF for
the paramagnetic fluid DIFFERS MARKEDLY from expectations from standard
perturbation theory. Our result for the LFF has a maximum close to 3$k_F$,
while perturbation methods yield a maximum near 2$k_F$. The available quantum
Monte Carlo data seem to agree with our results.These findings imply that many
effects, e.g., Friedel oscillations, Kohn anomalies, effective
electron-electron interactions, etc., are affected by the strong correlations
among anti-parallel spins in 2D.
