Margaret Atwood's novel, The Handmaid's Tale, described the horror of the authoritarian regime of Gilead. In this theocracy, self-preservation was the best people could hope for, being powerless to kick against the system. But her sequel, The Testaments, raises the possibility that individuals, with suitable luck, bravery and cleverness, can fight back.

But can they? There are countless examples of past and present monstrous regimes in the real world. And they all raise the question of why people didn't just rise up against their rulers. Some of us are quick to judge those who conform to such regimes as evil psychopaths – or at least morally inferior to ourselves.

But what are the chances that you would be a heroic rebel in such a scenario, refusing to be complicit in maintaining or even enforcing the system?