There are some events that change the world in an instant: the fall of the Berlin wall; the tanks rolling into Tiananmen Square; the aeroplanes flying into the World Trade Center.

So far, there have been no such defining moments in 2007. Perhaps we should be grateful for that, since world-shaking events are often sudden acts of shocking violence. But it makes it both trickier and more interesting to carry out my annual end-of-year exercise - listing the five most important events of the past 12 months. Nonetheless, I intend to try. If you want to make sense of world affairs, it is useful to identify the most significant events. Also, I like making lists. So here goes: