Read a May 16, 2013, Stateline.org article about state bans on use of Shariah and other foreign legal systems and whether those bans hinder international commerce or have other unintended consequences.

A survey released April 30, 2013, by the Pew Research Center explores the views of Muslims in 39 countries regarding Shariah.

Read a Sept. 3, 2009, BBC backgrounder on Shariah.

David Yerushalmi is co-founder and senior counsel at the American Freedom Law Center, a Michigan-based public-interest law firm whose motto is “fighting for faith and freedom.” He is a leading voice in the anti-Shariah movement.

Abed Awad is a New Jersey lawyer specializing in Shariah-related cases. He calls the anti-Shariah movement un-American and unconstitutional.

Articles about Shariah are collected on a Times Topics page at The New York Times.

Read a July 31, 2013, New York Times story that says harsh measures in Afghanistan that many attribute to Shariah are actually linked more to tribal customs than to Islamic law.

Read an Aug. 4, 2013, Associated Press story in the South Florida Times about a controversy in Nigeria over whether a proposed constitutional amendment concerning “age of consent” would conflict with Shariah.  

Read an Aug. 13, 2013, guest column posted by United Press International, in which retired Marine Lt. Col. James Zumwalt warns of attempts at a global Islamic takeover in which Shariah would be the universal legal code.