… is from page 17 of Razeen Sally’s 1998 book, Classical Liberalism and International Economic Order (footnote excluded):
[H]yperabstraction, far removed from reality, beguiles the intellectual mind; its theoretical products can easily serve as nostrums for all sorts of social ills; and its consequences can be catastrophic for mankind, as is abundantly evident from the attempt to implement the thought of Rousseau and Marx in the past two centuries.