Alongside the headline speakers at today's Big IF rally against hunger, former Archbishop of Canterbury Rowan Williams also took part.
Dr Williams, who now works back in academic life in Cambridge, led a minute's silence "to reflect on the pain" of death by malnutrition.
He declared: "Thinking about these unnecessary deaths, there should also be righteous anger. Fury that the injustice of hunger has gone on too long.
"So at the end of our silence, we must make a huge noise, to signify that we will never be silent on the things that matter."
Meanwhile, his successor as Archbishop of Canterbury, Justin Welby acknowledged that "mass movements of people" were need to get governments and corporations to match words with actions.
The Catholic Archbishop of Westminster, Vincent Nichols, pushed the point about immediate action home in relation to the G8 and beyond.
Rightly, he said, the campaign's focus in not "if only" but "when". Change is not a wish, but a possibility and an necessity.
'Enough Food For Everyone IF' is a joint coalition of over 200 UK organisations campaigning for action to eliminate the causes of hunger.
Its key message is: "There is enough food for everyone, yet one in eight people do not have enough food. This year, world leaders must tackle hunger and save millions of lives."
Among the many NGO's involved in the IF anti-hunger initiative, which is joining up issues of aid, land, tax aviodance and food reform, are a range of church and faith agencies.
They include Christian Aid, CAFOD, Tearfund, World Vision, Progressio and others.
Ekklesia supports the campaign, but argues with War on Want, the TUC and others that further action is needed, including action to secure 'food sovereignty' for the poorest.
* Ekklesia briefing, 'Hunger can be ended: but how and by whom?' - http://www.ekklesia.co.uk/node/17926
* The Big IF: http://enoughfoodif