Michael Heinrich’s article is really a continuation of the argument by Monthly Review that Marx’s law of the tendency of the rate of profit to fall (LTRPF) is not the main cause of economic crises.… Heinrich makes the following points: 1) Marx’s law is indeterminate; 2) it is empirically unproven and even unjustifiable on any measure of verification; 3) Engels edited Marx’s works badly, distorting his views about the law in Capital Vol. 3; 4) Marx himself, in writings during the 1870s, began to have doubts about the law as the cause of crises and started to abandon it in favour of some theory that took into account credit, interest rates and the problem of realisation (similar to Keynesian theory); 5) Marx died before he could present these revisions of his crisis theory, so there is no coherent Marxist theory of crisis.