Time of death is around 1970. Reading lists with few exceptions contain items from around or before that time.
Cause of death is internal, aggravated by external circumstances.
Changes in political winds. Critical obstacles to development in the third world, challenges of stagflation in industrialized countries, made it impolitic to focus on the growth race or take uninterrupted growth for granted. Individual choice without macrofoundations leaves us with the essentially tautological proposition that the economy grows the way it does because the micro units grow the way they do, because they want to grow that way, because that's what their utuility functions tell them to do. Even if bastard Keynesianism were riding high, the days of the aggregate neo-Classical model would still have been numbered. The autopsy report reveals a cricial flaw in the neoclassical theory.