Elaborating on this idea, Leon Trotsky famously described the economic development of the world as a process of uneven and combined development of different co-existing societies and modes of production which all influence each other. This means that historical changes which took centuries to occur in one country might be truncated, abbreviated or telescoped in another. Thus, for example, Trotsky observes in the opening chapter of his history of the Russian Revolution of 1917 that "Savages throw away their bows and arrows for rifles all at once, without travelling the road which lay between these two weapons in the past.