He was appointed private secretary to Gustavus III in 1788 and stood high in the regard of that monarch. He attempted all forms of poetry save the epic. In 1799 he was made chancery councillor ( in Swedish.
In 1818 he was appointed State Secretary. He was a bulwark of French Classicism against the attacks of the Romantic Phosphorists. He has been compared to the German Johann Christoph Gottsched.
His Samlade skrifter were published (Vols I-III, 1800-1802.
Vols IV-VI, 1831-1833).
Swedish Academy; Royal Swedish Academy of Sciences.