Exercise 1: Ripple effects

Cause: 30% of the world's population is discovered to possess magic.

Effects: 

1. Government regulations on persons with magic
2. registration of said magic users
3. ID card to show magic user is registered
4. New laws put in place to regulate when, where, and how. 
5. Or new laws to prohibit magic use
6.  people without magic fear those with magic
7.  Segregation of magic users and non-magic users
8. new ways of combining tech and magic
9. different levels of magic potions/items available to various classes of society
10. new forms of medicine and medical practice
11. new religions for formed
12. family members with magic being ostracized by non-magical family members