In an old townhouse in East Boston an elderly stooped man is tending rare orchids in his shabby office. His Labrador Sally lies on the floor between stacks of academic papers watching him as he shuffles past. This is Dr Gene Sharp the man now credited with the strategy behind the toppling of the Egyptian government.
Gene Sharp is the world's foremost expert on non-violent revolution. His work has been translated into more than 30 languages, his books slipped across borders and hidden from secret policemen all over the world.
As Slobodan Milosevic in Serbia and Viktor Yanukovych in Ukraine fell to the colour revolutions which swept across Eastern Europe, each of the democratic movements paid tribute to Sharp's contribution, yet he remained largely unknown to the public.
Despite these successes and a Nobel Peace Prize nomination in 2009 he has faced almost constant financial hardship and wild accusations of being a CIA front organisation. The Albert Einstein Institution based on the ground floor of his home is kept running by sheer force of personality and his fiercely loyal Executive Director, Jamila Raqib.
In 2009 I began filming a documentary following the impact of Sharp's work from his tranquil rooftop orchid house, across four continents and eventually to Tahrir square where I slept alongside protesters who read his work by torchlight in the shadow of tanks. . . .
Read more here: http://www.bbc.co.uk/news/world-middle-east-12522848.