[wolfram74]

I don't know, it's been a while since I've read on the subject, but I thought part of what drove the Irish to subsisting off of a monoculture was somewhat driven by necessity from the english consolidating lots of holdings to english lords and collaborators, tax policies shaping what little output they had left basically meant with the amount of arable farm land available to the Irish, it was only the surprisingly effective potato that could keep up.

If that recollection is correct, then while the english might not have lit the metaphorical fire, they definitely gathered the kindling.