. >> come >> host: professor thomas farr. his book is world of faith and freedom. why international religious liberty is vital to american national security. professor farr, why is it vital? >> guest: for two reasons. one is that religious freedom is a fundamental human right. most people accept that proposition. and it's under siege around the world. the pew forum on life and they said 70% of the world's population lives in countries in which religious freedom is severely restricted. that's almost three out of four people on the planet. and what's associated with this is a lot of violent religious prosecution, torture, rape, ungist imprisonment, injust execution. so it's a humanitarian crisis, and the united states has traditionally stood with the persecutor, but it's also a strategic crisis, because the data show -- and i would argue both history and common sense confirm it -- that without religious freedom you cannot, particularly in a highly religious society -- have a stable democracy. so, you think of this countries in the arab spring, all of them highly reli