perhaps. i'd argue that it really is that simple. for decades, many countries in areas that are well known, historically, for having famines have been importing most/all of their food because the food was available for export by other countries that are very good at growing things & they had excess. now those countries have stopped or drastically curtailed exports. the end result is that the famine countries cannot buy their way out of famine - and now the population isnt just a few hundred thousand but tens of millions.