The first time I met Ed Miliband, I was in a rather swanky room in Canary Wharf, surrounded by some of Britain’s most important business leaders. Ten years ago the meeting would have been better attended by that particular demographic than it was this year, but ultimately the annual event put on by Labour to say a ‘big thank you’ to British business leaders can still pull a decent crowd. Ed Miliband was one of two ministers in attendance, the other one being then business secretary Lord Mandelson. This is telling.

That Mr Miliband accounted for a full half of the Labour government’s delegation to such an important ‘thank you/please give us more money’ shindig in the glitziest business zone this side of the Atlantic, shows that he might not be as tone-deaf to big business as some might have you believe. Of course, if we listen to the reactionary response to Ed’s election as leader, from pundits like John Rentoul and Tim Allen, we might be worried that the bosses of some of the largest companies in Britain are starting to feel a lack of love from the opposition.

There are arguments that the public fell out of love with New Labour because it was too close to big money. The pundits on the left wing of the party use this assertion to suppress New Labour supporters. But they are wrong. The public fell out of love with New Labour as a reaction to the global economic crisis, not with the principle of supporting business as well as the worker. The left also ignores the fact that the leader we went into the general election with was one of the least popular prime ministers in history. The core principles and values of New Labour are still those of the public, and will be central to electing Ed Miliband the next prime minister.

For the next century, barring a world war, or a global revolution, the tenets of New Labour – encouragement of enterprise and building a good social safety net, the best of free market principles and the best principles of socialism working hand-in-hand to benefit not just slim interests at the margins – will be the tenets of any and every successful government and opposition. The days of dogmatic politics, from the left or the right, are over. Developments over the last century or so have made centrism the only way to govern, and the reforms of the Labour Party in the 1990s radically reframed British politics to such an extent that even the Conservatives had to play our game in order to get elected (and they failed at that).

If Rentoul and Allen are the only ones defending New Labour, we can expect a bleak future. They might raise valid points, as Tim Allen did in the Observer this weekend, but there is a sense of dogma coming through which is damaging. Ed Miliband is no Tony Blair, but nor is David Miliband. Being angry at the winner because he didn’t kowtow the New Labour mantra over the summer is a waste of energy. As much as it benefits Ed, at least internally in the Labour party, for us to believe that New Labour is dead, it simply isn’t.

That energy would be best placed explaining how the 2010-2015 period of opposition for Labour can be used to figure out what the natural evolution of New Labour is. For the movement must evolve if it is to survive. In many ways, Tony Blair was a great leader and prime minister. But Tony’s days are over. We don’t know if Ed Miliband will have what it takes to win the next general election, but we can be sure that if he does, it will be because he has understood and adopted large chunks of the New Labour approach. We can’t just hope to shift the centre ground to the left, because that wouldn’t be the centre ground.

We need to be a loud and proud force inside Ed Miliband’s Labour party if the party is to stand any chance of re-election this generation. To do that, we have to be constructive, avoid succumbing to the attempts of certain journalists to talk the new leader down, and give Ed not only the chance, but the support in the form of ideas and policies, to help the New Labour project to evolve during this testing period. If we simply rant and rave, as some will have us do, we will only end up damaging the party we love, and leaving the country to the whims of the blue and yellow Tories. And that would indeed spell the end of the New Labour project.