This organization fanned outward from the deep south, and wielded frightning power in places as diverse as Oregon, Oklahoma, and Indiana. Its membership included many from the middle class who were fearful of losing social and economic gains, and nervious about a new youth culture that seemed to be eluding family control.

They forced schools to adopt bible reading and to stop teaching the theory of evolution, and pledged its members not to buy from merchants who did not share their views, as well as fueled racial tensions against Mexicans in Texas border cities.

Who was it?