I have tried in this book to elucidate, as far as was in my power, the development of the fundamental ideas of the Socialist parties in the Russian Revolution and their re?ection in the life of the masses. A revolution is a very complex thing, especially in such an immense country as Russia, with its large and varied population, and it goes without saying that, far from claiming to have described it exhaustively, I realise only too clearly that there are numbers of questions on which I have barely touched.