Magnus Jacob Crusenstolpe, a Swedish author, born at Jonkoping March 11, 1795, died in January, 1865. He was appointed assessor of the superior court of Stockholm in 1825, and became generally known in 1828 by a political work (Politiska asigter), in which he eulogized what he termed the era of liberty, extending from 1719 to 1772. In concert with Hjerta he became in the same year editor of an opposition political paper, but the two collaborators soon separated, each to found a journal of his own. Hjerta established the Aftonbladet, which still exists, advocating extreme democratic ideas, while Crusenstolpe became editor in 1830 of the Faderneslandet, in which he renounced the liberal principles he had formerly maintained, and which ceased when the patronage of government was withdrawn from it in, 1833. In 1834 appeared his Skildringar ur det inre af dagens historia, a piquant melange of truth and poetry on questions of social order, which passed through many editions; and subsequently he purchased the Tessin library, celebrated for its historical manuscripts, from which he took the materials for his Portefeuille (5 vols., 1837-'45), and for his Historish tafla af Gustav IV. Adolph's forsta lefnadsar (1837). From 1838 to 1851 he published a political almanac under the title Stallningar och forhdllanden, which had great popularity, but which reflected upon the government, and caused his imprisonment for three years, a condemnation that resulted in several violent riots.

His Morianen (6 vols., Stockholm, 1840-'44) is a romantic description of the history of Sweden during the Holstein-Gottorp dynasty. He afterward published a number of novels, including Bigtfadern (1842), Carl Johan och Svenslcarne (1845-'6), and Huset Tessin (1847-9). His stories show skill in the construction of the plot, and great purity of style. They are very popular in northern Europe, and most of them have been translated into German.