In human history (and in no particular order):
1) The invention of writing
- pretty obvious that one
2) Greek survival against Persia
- essentially maintained and allowed the formation of the ideas behind the Western World
3) Roman victory in the Punic Wars
- paved way for Roman domination of Europe
4) Crucifiction of Christ
- again, pretty obvious
5) Fall of western Roman Empire
- allowed the formation of European nations, growth of individualist philosophies
6) Islamic expansion of 7th Century
- paved the way for all kinds of things, crusades, modern middle-east tensions etc.
7) Discovery of Americas
- birth of early-modern age, colonialism sees European countries begin to dominate world
8) Invention of Steam Engine
- industrial age made possible, paves way for modern world
9) Battle of Trafalgar
- ensures that the British Empire becomes dominant force in the world, spreading of English language and ideals
10) Allied victory in WW2
- 'triumph of liberal democracy' - shows democracy to be the most effective form of governance, leads to massive global economic growth
Garggh. Probably shouldn't think too hard about this or my head will explode - missed so many important things and this list is totally western-centric. Oh well, with more space I'd have included something about the printing press and a whole lot about China.