I don’t have to find sources for you. But the Irish famine literally was a famine of laissez faire policies. The British landowning class of Ireland deliberately chose to export the agricultural produce of Ireland because it was more profitable. The government refused to step in to create regulations or limitations on exports and that’s what caused the famine. Also, the mono-culture of potatoes was also a factor of capitalism. Industrial mono-culture is the agricultural form of capitalism.