Brecht's play makes its point in its title: in nearly every circumstance, the rise of a murderous or even just morally questionable government can be resisted if there is enough popular will to stop it. So where does Msamati lay the blame for Mugabe?
'Look, we can't pretend the people doing the raping, pillaging and stealing are Westerners: they are Zimbabwean,' he says. 'But there's a political flipside - you'd be amazed, even in times of crisis, how much money is still passed between the Zimbabwean government and Britain in terms of business, for example.'
It's unsurprising Msamati should be delighted to star in The No.1 Ladies' Detective Agency film - it offers a very different story.
'Yes, it's just so beautifully positive,' he says. 'There are no child soldiers or corrupt politicians. But it's a double-edged sword:
being a person of colour, your representation is so limited that you want everything to be in there all the time. But I'm learning that every story is a beginning.'
The Resistible Rise Of Arturo Ui, in preview, opens tomorrow until Mar 15, Lyric Hammersmith, King Street W6, Mon to Sat 7.30pm, Wed mats 1.30pm, Sat mats 2.30pm, £9 to £27, £10 concs.