> laissez-faire advocates ... were ... generally in
dominant positions
> Roger Backhouse


These economists were "laissez faire" in thinking that
greatly expanded government intervention was not
warranted, but they were not radically pro
free-market.

A pure laissez faire position would have opposed
central banking and the federal income tax, both
initiated in 1913.

Were any economists prior to the 1930s for a pure free
market?

Fred Foldvary