Why did the First Crusade happen? → Jews wanted to reclaim important religious sites in Palestine from Muslim caliphs.
→ The Eastern Orthodox church wanted to unite all Europe's Christians under its authority.
→ European Christians wanted to expand their trade opportunities in the Middle East.
→ Pope Urban II feared that the Seljuk Turks might keep Christians from visiting the Holy Land.

Two gymnastics teams are intense rivals. the first team has started recruiting new gymnasts from different cities and even foreign countires in an effort to build a stronger team. after learning this, the secondteam begins its own recruitment campaign to find better gymnasts. over a period of months, each team recruits dozens of players, each time trying to find a better recruit than its rivals most recent addition. which idea from the cold war is most similar to this scenario