When Keynes’s General Theory was published in February 1936, it obliterated all else on the scene in academic economics. Hayek was known to be workin… - Alan O. Ebenstein

Hayek did not believe that the same sort of prediction—and therefore control—that is possible in the natural sciences is attainable in the realm of society. At best, he thought, only a “pattern” of the future can be predicted in social life. He thought that to attempt to formulate laws of societal development akin to the laws of the physical sciences, as Marx attempted, is doomed to failure.

Hayek had high regard for Marx in technical economic theory and considered him a predecessor in his business cycle theory. [...] It was not in technical economic theory that the classical Austrians disagreed with Marx. So towering a figure in history is Marx that discussion of his thought in summary form is always difficult, for there is so much that he said and that others have said about him. At the same time, so tendentious, ill-spirited, and just plain wrong a thinker was Marx that it is surprising that he may have had some of the influence attributed to him. Hayek’s opposition to Marx was in the realm of practical political emanations from Marx’s thought. Here he considered Marx’s influence to have been wholly pernicious.

At the same time, as Hayek maintained elsewhere, the facts of the social sciences do not lend themselves to the same degree of prediction, or explanation, as the facts of the natural sciences—it is for this reason that there are degrees of prediction or explanation. Prediction may be expressed numerically, moreover, “not as a unique value or magnitude but as a range,” narrow in the natural sciences and potentially very broad in the social sciences. In the social sciences, Hayek modified the conception of a numerical range to a “range of phenomena to expect.” This was his concept of pattern prediction, or explanation of the principle, broad, general predictions.