How many Iraqis died?

How many Iraqis died in the US led invasion of 2003 and the subsequent occupation?

Pakistan-born Glasgow-based sociologist, Muhammad Idrees Ahmad, writing in the UAE journal The National on 5 April 2013, provides some answers – see True costs of Iraq War Whitewashed by fuzzy maths, republished the same day by the UK Stop the War Coalition under the headline No more fuzzy maths: how many died in the Bush-Blair war on Iraq?.

The most commonly cited source, the UK-based online initiative Iraq Body Count (IBC), uses a passive surveillance method to estimate what it calls “violent civilian …