The Green Party in England could be on the verge of another breakthrough, after the election of their first MP to Westminster this May.

If you want a primer on Wilkinson and Pickett's joint book The Spirit Level, then the pieces here are worth a look (one by me). And for a comprehensive set of responses to their critics, including a pre-emptive strike against Gerry Hassan’s recent piece on OK this is all you need. (It is worth noting too that Wilkinson and Pickett’s work is peer-reviewed; that of their critics isn’t.)

For me as a philosopher, the thing about The Spirit Level that is most exciting is that as a study of the pervasive harms of inequality it strongly suggests that John Rawls's 'difference principle', which says that inequalities are OK provided that they materially benefit the worst off, a principle that has dominated political philosophy for 40 years, is simply wrong. Empirically wrong.

So, it is indeed going to be May 5, as I wrote in breaking the news, last week.

How ought we to think of our relationship to — our responsibility for — future people? Is this question (a question pressing all the harder in the wake of the recent failure to adequately safeguard those future people, at Copenhagen) essentially a question of justice? The rallying cry at Copenhagen was, "What we do we want? Climate justice! When do we want it? Now!" But what if it's not enough to call for justice?

Now is not the time for soundbites, but I feel the hand of history on my shoulder, so I can’t help it. A century ago, the Labour Party won its first seats in Westminster. Just a generation later, it formed its first government. And another generation later, it formed perhaps the greatest government that this country has ever had, the 1945 Labour government. Now the torch has been passed. The first Green Party MP.

Now, we’ll be similarly unstoppable, I believe. (And the time-scale needs to be shorter. The planet can’t wait 50 years.)

I spent yesterday ‘on point’ for Green Party Deputy Leader (and my fellow Norwich Councillor) Adrian Ramsay, in a series of interviews on College Green just outside the Houses of Parliament. Adrian spent the afternoon speaking live to Sky and the BBC, and doing pre-records with numerous other media outlets (from across the world), as the great and the good of politics-as-usual came and went, doing much the same: Peter Mandelson, Alan Duncan, Michael Howard, Ming Campbell, Ben Bradshaw, Ed Balls, David Miliband, Frank Dobson, etc etc.