"He Knew He Was Right" by Anthony Trollope is a novel written in 1869. A marriage crumbles when a wealthy husband's jealousy over his wife's innocent friendship spirals into obsession. His wife's stubborn refusal to submit to his unreasonable demands drives them further apart, leading to separation and madness. Meanwhile, romantic entanglements unfold among their friends and relatives, as suitors compete and families scheme. Trollope weaves multiple interwoven stories of love, pride, and the devastating consequences of inflexibility in this exploration of Victorian marriage and society. (This is an automatically generated summary.)