A huge survey of the world's Muslims released Tuesday challenges Western notions that equate Islam with radicalism and violence.

The survey, conducted by the Gallup polling agency over six years and three continents, seeks to dispel the belief held by some in the West that Islam itself is the driving force of radicalism.

It shows that the overwhelming majority of Muslims condemned the attacks against the United States on September 11, 2001 and other subsequent terrorist attacks, the authors of the study said in Washington.

"Samuel Harris said in the Washington Times (in 2004): 'It is time we admitted that we are not at war with terrorism. We are at war with Islam'," Dalia Mogahed, co-author of the book "Who Speaks for Islam" which grew out of the study, told a news conference here.

"The argument Mr Harris makes is that religion in the primary driver" of radicalism and violence, she said.

"Religion is an important part of life for the overwhelming majority of Muslims, and if it were indeed the driver for radicalisation, this would be a serious issue."

But the study, which Gallup says surveyed a sample equivalent to 90 percent of the world's Muslims, showed that widespread religiosity "does not translate into widespread support for terrorism," said Mogahed, director of the Gallup Center for Muslim Studies.

About 93 percent of the world's 1.3 billion Muslims are moderates and only seven percent are politically radical, according to the poll, based on more than 50,000 interviews.