UK 12 April 2011 Why I have joined the Liberal Democrats A good thing to be said for a currently unpopular party. Sign UpGet the New Statesman\'s Morning Call email. Sign-up (Picture courtesy of Conservative Home) Last week I did the oddest thing -- I joined the Liberal Democrats. At least I cannot easily be accused of crude political opportunism. There cannot have been many who joined the party last week, or any recent week. It is not as if I am attracted by their popularity. Indeed, the decision is a strange one in a number of ways. I am opposed to the Alternative Vote proposal, as I simply do not believe third or fourth preferences are of equal value to a first preference. I do not accept assigning powers to European Union institutions is necessarily a liberal or a democratic exercise. Liberal Democrat MPs were inexcusably wrong to break a clear pledge not to increase tuition fees. And the Deputy Prime Minister is at best an uninspiring figure. On these issues, and many more, I will not be a partisan party member. In fact, I expect to be thrown out of the party in a week. However, there is one very good ongoing reason to support the Liberal Democrats, and it is provided by Tim Montgomerie of Conservative Home. Montgomerie, a staunch Tory, has been tracking the effect of the presence of Liberal Democrats in the Conservative government: see his posts hereand here. Montgomerie is right in his analysis: the current government is significantly more liberal than an entirely Conservative administration would otherwise be. Politics is about power. The Labour opposition is impotent. In government they were illiberal and often brutal. There is only one political force that is having an actual liberal effect in our polity as it is presently constituted, and it is the Liberal Democrats. It may not be as strong a power as it should be. The Liberal Democrats may do well to leave the coalition and force a minority Conservative administration to gain concessions on a vote-by-vote basis. But Montgomerie's "concession-o-meter" shows why anyone who wants policy to be more liberal than it otherwise would be should support the effect the Liberal Democrats are having on Coalition government. What the Liberal Democrats are doing in practice may not be popular, but it certainly should be commended by any liberal person. David Allen Green is legal correspondent of the New Statesman. › When Nick Clegg met Mrs Duffy David Allen Green is former legal correspondent at the New Statesman. Subscribe For daily analysis & more political coverage from Westminster and beyond subscribe for just £1 per month!