For all of human history, people have migrated in response to environmental changes. Institutional xenophobia, which may have roots in behaviors that could be useful in prehistoric times, currently obstructs migration. Sadly, in a time when standard travel is cheaper and safer than ever, hundreds of people perish each year trying to cross the Mediterranean Sea in makeshift boats.
Migration is an obvious response to poverty and climate deterioration. Thus, it is good news to see a commentary published in Nature calling for more open borders to ease adaptation to climate change. And it is not authored but some ideologically-driven liberal zealot - as some would probably label me - but by seriously politically-correct members of the UK government, including John R. Beddington. Perhaps times are changing for the good.