A suicidal action in order to harm the enemy. Kamikaze soldiers are prepared to give up their lives for their cause, often due to a belief that they will be honored in the afterlife because of it.
Answer:
Social Contract is your answer
When merchants traveled between towns selling goods, they would have items from different places and cultures. The buyers of these merchants would be fascinated with the new items they had never seen before of different cultures, and so they would buy those items and spread them around until everybody knew about and became interested in other cultures. The cycle continued, causing more and more people to appreciate other cultures.
