Some 100 writers, including Pulitzer Prize-winning Alice Walker, Richard Ford, and Junot Diaz, are urging the PEN American Center to deny any support from Israel as it denies “basic rights to the Palestinian people.”

The writers sent an impassioned letter to PEN America in March, but only now has it been published. PEN American Center, created in 1922, is a group aiming to promote literature and support literary fellowship.