Why, I have asked myself, do I feel so strongly against the European Union that I have, for several years, spent a large proportion of my time, energy and indeed money trying to help those who want to get the UK to leave it?
Is it our economy, is it immigration, is it security or is it one of many other issues?
The answer has come to me very clearly.
It is none of these things, important though each of them is.
The absolutely crucial point is that we must govern ourselves.
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If we were invaded by a foreign power, with armed forces so superior to ours that resistance was hopeless, surrender might, just might, be right. Otherwise we would have to resist; it is fundamental that a country must make its own laws and enforce them in its own courts.
That is not happening: it will not happen as long as we are in the EU.
Far too many of our laws are forced on us by the EU, and cannot in practice be changed.
Worse still, although we can leave the EU if we decide to, the European Court of Justice is, until we do that, superior to our own courts, even our ‘Supreme Court’.
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Why on earth should we put up with this? It has nothing to do with force of arms. Our armed forces are bigger and better than those of any other EU country, and quite likely more effective than all of them combined.
Are we then afraid that, while their armies are nothing to fear, the other members would, if we left, be horrid to us? Would they punish us for leaving, or to show other members how dreadful their fate would be if they had the temerity to do the same?
Well, there are those who are fearful of both. But that is pathetic. Democracies act according to what is good for their people, not out of pique. Governments get thrown out by their voters if they do not.
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The other EU countries would be mad to refuse to trade with us because they sell vastly more to us than we sell to them. They are not mad and they need the money!
Actually it would matter very little if they did refuse to trade with us free of duty. Tariffs these days average little more than 1% compared to up to 30-40% when we joined 40 years ago.
The USA, Japan and many, many other countries find no difficulty in exporting to the EU without any kind of special agreement with it.
There are, moreover, huge positive advantages in being free, free of EU chains, that is. Instead of being stuck with about the only group of nations in the world whose economies hardly grow, we can make trade agreements with dynamic countries like the USA and China, or with our friends in the Commonwealth.
We cannot do that now: EU rules forbid it.
That brings me back to the fundamental point, which I have heard Justice Secretary Michael Gove put so well.
Again and again and again, he tells us, every minister is told by his civil servant, “I quite understand, Minister, but we cannot do that. It is against EU rules”.
Let me make one point about security. It seems obvious to me that we shall be far safer out of the EU. Up to a million people are getting into Europe each year. Inevitably some are terrorists. Once they get a passport from an EU country we have no right, while we are a member of the EU, to stop them coming to our country: enough said.
The British are apt to leave things dangerously late, as we and our governments have over the last 40 years. But we do have a justified reputation for getting things right just in time and this referendum is indeed just in time.
Let us break free on June 23 and be ourselves.
The politicians may get it wrong, David Cameron may think us voters stupid and believe he can pull the wool over our eyes, but the fact is that the voters are not stupid, and I believe they will do the right thing on June 23 and vote to leave.
The bookmakers are saying it is 2 to 1 against a vote to leave. Worth a bet? I think so.