You are shooting over the target, because first of all, with every time a fertile cell or a sperium dies, the possibility of new life dies.
Second, it is a point to argue about since what time the fetus can really be called a human being, but who are you (I suspect that you are not a girl ?!) to say when it is.
Third, I think that an unborn child is only a human in potentia, while the mother is already an existing human being, so her well-being is of more importance than the child. She can decide what happens with that life, because she will have the trouble and reputation for the child.
As you put it, the legalization of abortion would result into a drastoc decrease of birth rate. I don't think this will be the result, because you are doing the "Green"-reasoning, which means you use fears to validate your argument. And you consider women to be stupid and amoral, don't you?
Otherwise you would have to acknowledge that some other humans might come to the same conclusion that this life is a beautiful thing even though it will be hard to raise and she will abstain from abortion. Still the right to abortion should always be protected.
And Mongoose, please point me to a statistic that shows the numbers you are claiming to know?
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To the EU thingy:
Well, yes, we had our time on imperialism, but still, we have a history of blood-shed between France, Germany, GB, Spain, Italy and Poland which isn't easily forgotten and which will always set us apart from each other. A supra-nation like the US is very unlikely, still the EU can be a military super-power in the future, but this wouldn't be anything like the US.
First, the EU-forces would be slower to deploy, because of struggles in command-chain and the still nationalistic tendencies in the bigger nations (Spain, Italy, GB, Germany and France)...
If you ever met a French, you will probably know

It think we can assume that the EU can merge to something like the Holy Roman Empire (which was the prelude to Germany), but it would be hard to go further, because we don't have many common cultural traits.
(different languages, different habits and different philosophies, although it is called western-culture it has a lot of diversity)