AbstractThe present state and future possibilities of controlled‐nuclear‐fusion research are reviewed, including basic concepts and problems, as well as various approaches based on magnetic‐ and nonmagnetic‐confinement schemes.Considerable progress has so far been made in both plasma physics and fusion‐reactor technology, and a closer relationship has been established between theory and experiments. Still, none of the present approaches will, for certain, lead to the final solution of a full‐scale reactor. Intensified work along broad lines, with emphasis also on basic research and new ideas, is necessary for fut