Golden age problems

Sir: Johan Norberg’s ‘Our golden age’ (20 August) is absolutely right — we do live in a golden age; antibiotics still work, we have less starvation, the world is open for trade, with all its benefits. But there is a fly in the ointment: human overpopulation. Global warming (if you believe in it), degradation of the environment, extinction of species, all are consequences of it.