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We review the effective field theories (EFTs) developed for few-nucleonsystems. These EFTs are controlled expansions in momenta, where certain(leading-order) interactions are summed to all orders. At low energies, an EFTwith only contact interactions allows a detailed analysis of renormalization ina non-perturbative context and uncovers novel asymptotic behavior. Manifestlymodel-independent calculations can be carried out to high orders, leading tohigh precision. At higher energies, an EFT that includes pion fields justifiesand extends the traditional framework of phenomenological potentials. Thecorrect treatment of QCD symmetries ensures a connection with lattice QCD.Several tests and prospects of these EFTs are discussed.Comment: 55 pages, 18 figures, to appear in Ann. Rev. Nucl. Part. Sci. 52  (2002

EFFECTIVE FIELD THEORY FOR FEW-NUCLEON SYSTEMS