What is the main idea to the three little pigs

I think its 'a stronger attitude can help you in life' and in the story is 'a stronger house can help you survive.'
The main idea is about the 3rd pig being smarter and more industrious than the other two pigs by building a house out of bricks, so the Big Bad Wolf cannot blow the house away.

Generally spontaneous human combustion is something that still bewilders some, human combustion happens very rarely and doesn't affect the surrounding areas, so unless you want to set your self on fire, human combustion will remain spontaneous and very rare.

The greatest pyramids were built in the middle kingdom