Forget ideology, liberal democracy's newest threats come from technology and bioscience John Naughton

The BBC Reith Lectures in 1967 were given by Edmund Leach, a Cambridge social anthropologist. "Men have become like gods," Leach began. "Isn't it about time that we understood our divinity? Science offers us total mastery over our environment and over our destiny, yet instead of rejoicing we feel deeply afraid." That was nearly half a century ago, and yet Leach's opening lines could easily apply to today.