Barbara Stocking, Oxfam's chief executive, said a "global new deal" was needed to reverse decades of increasing inequality.
We can no longer pretend that the creation of wealth for a few will inevitably benefit the many - too often the reverse is true.
Concentration of resources in the hands of the top 1% depresses economic activity and makes life harder for everyone else - particularly those at the bottom of the economic ladder.
In a world where even basic resources such as land and water are increasingly scarce, we cannot afford to concentrate assets in the hands of a few and leave the many to struggle over what's left.
More top news
Cloudy and damp across much of England and Wales, although the rain should turn lighter and more patchy by the afternoon.
A British journalist based in Egypt has been expelled from the country as authorities tighten control over the media ahead.
Airline fees for services such as name changes and airport check-in could be targeted under a new Government clampdown.