Why do the revolving doors of power always leave us disappointed? In Why Politics Fails, award-winning Oxford professor Ben Ansell shows that it's not the politicians that are the problem, it's that our collective goals result in five political 'traps'.

Democracy: we all want a say in how we're governed, but it's impossible to have any true 'will of the people'. Equality: we want to be treated equally, but equal rights and equal outcomes undermine each other. Solidarity: we want a safety net ...