List four reasons why people joined the crusades

well id say ...
1. people went on Crusades because they wanted to take back Jerusalem by reason that they thought that it was rightfully theirs since it is there where Jesus died.
2. some people did it for honour, revenge or love.
3. the people wanted their sins to be forgiven, to go to heaven or to take back goods from the Holy Lands or because they had committed a crime and were forced by the church to go on a Crusade.
and 4. some people just went on Crusades for fun.

Permanent settlements:

1. Not having to worry about constantly moving

2. Knowing your ground and surroundings

3. Can expand your ground and start a community where you are

Nomadic:

1. Food is always available

2. If you run out of land you can always get more

3. Never have to worry about building a village because you're always on the move