Why was only the first volume of Das Kapital published during Karl Marx’s lifetime?

Only the first volume of Das Kapital was published during Karl Marx’s lifetime because the subsequent volumes remained unfinished at the time of his death in 1883.1

While Marx spent years conducting research at the British Museum and drafting his magnum opus, he did not complete the manuscripts for the second and third volumes. Following his death, his close collaborator Friedrich Engels took on the task of editing Marx’s rough notes and uncompleted manuscripts, eventually publishing the second volume in 1885 and the third in 1894.213