He considers relevant to study the History of Economic Thought:
HET explores the foundations of economic thought, ranging from Smith and the classics to general equilibrium and the marginalists.
I would go so far as to say that HET should be a prerequisite for anyone who aims to be academically active within Economics and related fields.
As Steve Keen has noted in “Debunking Economics”, the solution needs to come from the outside of our current paradigm.
From Smith and his theory of moral sentiments to Walras and his attempted formalisation of Economics, The History of Economic Thought shows us that Economics has never been homogeneous, and it need not be.