Read Robert the Monk's account of Pope Urban

Read Robert the Monk's account of Pope Urban II's call to crusade found on the Internet History Sourcebooks Project site at http://www.fordham.edu/halsall/source/urban2a.html.

Why would Christians in the West be moved to embark on a dangerous journey to fight in the Holy Land after hearing Pope Urban's speech at Clermont?

Note: The essays must be between 300 and 500 words in length, double-spaced, Be sure to document your sources properly using either the MLA or Turabian (Chicago Manual of Style) format, can't use wikipedia as resource.