The 2003 vote to invade Iraq has haunted Labour ever since - losing millions of votes that have yet to be regained and causing around half the party's membership to resign. Nothing in Labour's history has traumatised it quite so much perhaps. Now again Labour is being asked to support a war that lacks clear United Nations sanction - or a coherent purpose.
The road to the Paris climate talks has been paved across decades. And as leaders convene in the capital today, they'd do well to look to those campaigners - past and present - whose resolve, courage and vision has roused the world to reach this moment.
We all wish to see an end to the war in Syria and end to terrorist attacks. We all want peace to be achieved in the Middle East and in the wider world. The decision facing our Parliament is whether UK military action in Syria now can deliver that. I believe that the Prime Minister has not demonstrated that sufficient lessons have been learned from UK military action in Afghanistan, Iraq and Libya.
It's time to rethink how the police respond and relate to children. What our work at the APPGC shows is that by treating under-18s as children, being mindful of their needs and vulnerabilities, we can prevent children from being needlessly drawn into the criminal justice system and allow them to grow up with a more positive attitude to the police.
London is way behind on solar power compared with the rest of the country, and it's frankly embarrassing to be on the train North and whizz past villages covered in solar panels, when in the capital they are as rare as hen's teeth.
This weekend, Momentum supporters have sent 9,000 emails to Labour MPs calling on them to oppose UK bombing of Syria. Despite not being part of Labour, the group wants to influence Labour MPs. I'm still a bit confused about the role of Momentum in this age of the 'New Politics'...
The Trade Union Bill is not the only piece of draft legislation currently attacking unions. Largely unnoticed the Enterprise Bill is shuffling through Parliament. Mostly uncontentious save one clause that should cause alarm to any public sector worker facing redundancy in the next few years.
We demand long term, sustainable funding for vital domestic violence services. We demand an end to austerity. We will remember the services lost and we will remember the women who haven't survived and the women who are surviving despite the government's brutal austerity measures. Together we remember - together we will win.
Air strikes would be nothing new, the US, France, and more recently Russia, have been bombing Syria for months. The rhetoric may be about freedom for Syrians, but the air strikes have fuelled the ongoing civil war and exacerbated the humanitarian catastrophe unfolding on the ground.
In the interests of taste and decency, let us look away from the gruesome spectacle of the civil war that has engulfed the Labour party and concentrate instead on the far more serious conflict in Syria. So here are some questions that you might like to ask yourself (with my answers) before you decide whether you agree with David Cameron that the UK should now join the international military action against IS in Syria.
Air strikes in Syria are the latest chapter in the unwinnable 'War On Terror'. Whilst we still await the Chilcot report, two governments on from the Iraq Inquiry, here are 10 lessons will still haven't learnt from Iraq, which will doom us to fail to bring peace in Syria.
The net migration target is far too blunt and crude to be much use to anybody. The target lumps together refugees fleeing ISIL with entrepreneurs from the US, cleaners from Poland and students from Hong Kong. It will never offer a sophisticated or useful snapshot of the state of immigration in Britain, other than to testify that it exists.
By taking difficult decisions, we've turned things around. After five years spent clearing up Labour's mess, I'm proud that we're now in a position to focus on rebuilding Britain and creating a brighter future for everyone in it.
Ultimately, the Chancellor's focus on building new homes in the Spending Review was welcome - but helping a broader range of people, not just aspirant home owners would be a more positive way of using the additional money.
The bottom line here is this: the only way we can control immigration into the UK is to take back control of our borders. This means we have to stop our open-ended EU free movement of people obligations to potentially hundreds of millions of EU migrants. The only way we can do this is to leave the EU.
Many of us didn't believe it when the Tories attempted to detoxify, but it's a cold comfort that we were proved right. Now, with Cameron and Osborne riding roughshod over our environmental protections and welfare state, the toxicity is back with a vengeance.
Military action in Syria is not a move to be taken lightly, that is why our leader, Tim Farron, joined by all our past leaders, have written to Prime Minister David Cameron outlining our position. To avoid a repeat of the mistakes in our past the government should listen and take action.
The Autumn Statement is a ritualistic sham. The Chancellor's statement to Parliament gives the illusion of accountability. In fact, Parliament is powerless to do anything but rubber stamp his plans. Unsustainable spending is possible because there are no real checks on the Treasury's dominion over taxpayers' money. The solution is to empower Parliament.
When Osborne started to address the House of Commons about the tampon tax I was confused, but still hopeful. Might the Mother of Parliaments finally witness women-friendly policy-making? Er, no. I was staggered. I am still staggered. Not only is this decision incredibly disappointing, it is incredibly revealing.