Had Marx got his way, society would be so happy being revolutionaries, there’d be no need for religion. He’d obviously never been to a Gulag.

Ever wondered why Karl Marx thought religion was like Opium - or whether religion is possible without a god? Voiced by David Mitchell, this series of four 60 second animations examines different ways that religion has been viewed by non-religious thinkers. As well as Marx and Dawkins, religion is put under the microscope by thinkers Auguste Comte and JJ Bachoffen.