Cycle concept and the granite problems. Discusses the relationships between orogenesis and plutonism in the Precambrian of Sweden. In 1936, Wahl introduced the termsprimorogenicandserorogenicfor different relations in this respect. Some aspects of the problem are here considered, especially in the light of scientific development in other regions. A review is given of the Cretaceous plutonism in the Cordilleran orogen of the Americas, including reference to an important paper by Gilluly (1963), as this plutonism gives an illustration of geologically contemporaneous primorogenic intrusions, similar in their magmatic development but with different relations to the structure of the invaded formations. Reference is also made to a paper on the “Main Donegal” granite by Pichter & Read (1958). Then the primorogenic granites of Central Sweden are discussed.