Bethany Hamilton has been around the world training for surfing competitions and competing in surfing competitions.
Australian's have surfed for years and tourists thought after watching this great feat that they would also like to try surfing. When the tourists went home to their relevant countries they decided to try to relive the experience on their own shores. This is probably why surfing spread throughout the world.
World Surfing Reserves was created in 2008.
How did chewing gum get spead around the world
Christianity
ltaly
They're spread around the world... usually along the edges of tectonic plates.
One major product is the ford company car, which has spread pretty much all around the world.
The library in Nineveh
People have transmitted them.
Hinduism is spread by the president of the united states long ago he met them and told them they could go around the world and spread there culture.
Word of mouth, i guess