Will human actions result in the demise of huge numbers of other species?
What is the chance of the human race surviving the 21st century?
Could assemblies of ordinary citizens help heal our political divides?
Have British politics been more shaped by Irish history than most MPs are ready to admit?
Does a falling currency help or harm the economy?
Are we living in a golden age of political conspiracy theories?
Does being born to non-married parents affect a child's prospects in life?
How influencers are trying - and succeeding - in changing our world views
Jim Naughtie examines what the Trump presidency means for America's old European allies.
Republican insider Ron Christie on how Donald Trump's presidency has changed his party.