The butterfly and the boiling point
And finally, there is always the surprise of: Why now? Why did the crowd decide to storm the Bastille on July 14, 1789, and not any other day? The bread famine going on in France that year and the rising cost of food had something to do with it, as hunger and poverty does with many of the Middle Eastern uprisings today, but part of the explanation remains mysterious. Why this day and not a month earlier or a decade later? Or never instead of now?