Every now and then you say or write something you may well come to regret. Engels was a mortal like the rest of us. As I have been rereading his flawed gem, The Origin of the Family, Private Property and the State, I came across this gem:
Iron came to be utilised by man, the last and most important of all raw materials to play a revolutionary role in history, the last—if we exclude the potato (MECW 26: 262).
Of course, in the context of brutal British imperialism, especially in Ireland, the potato might have loomed larger in 1884 than it does now. Even so, I suspect he may have laughed at this had we been discussing it this evening.