Almost 13,000 Christian clergy have done it. Nearly 500 Jewish rabbis have too. Now, Islamic teachers, or imams, have begun signing an open letter declaring that there is no clash between their religious faith and evolution.

The Imam Letter, launched this week in the US, is the latest challenge to fundamentalists of the three Abrahamic religions who reject evolution in favour of creationism. The Clergy Letter was launched in 2006 and now has 12,725 signatures, followed three years ago by the Rabbi Letter, which has 476 signatures.

Like its predecessors, the Imam Letter explains why it’s OK for believers to accept the truth of evolution. It also calls for a ban on creationist teaching in science classes. “As imams, we urge public school boards to affirm their commitment to the teaching of the science of evolution,” says the letter, written by T. O. Shanavas, a doctor in Michigan and member of the Islamic Center of Greater Toledo in Perrysburg, Ohio.

“It shows that evolution and science can transcend what some people see as quite deep religious divisions, providing a unifying factor representing common ground between them,” says Michael Zimmerman of Butler University in Indianapolis, Indiana, the architect of the Clergy Letter Project. “Christians are really excited about the Muslim letter,” he says. “They realise that Islam is just as fractured as Christianity, with just as many people who take their scriptures out of context to deny the truth of evolution.”

Recently, for example, an imam in London was hounded out of his mosque and has suffered death threats for openly declaring support for Darwinism. Likewise, in Christian communities, especially in the US, fringe fundamentalists continue to push for teaching of creationism in science classes.