If you would like to use marijuana[for medical use], the best state is California.
If you are are a sex offender, you had better move to the states don't have death penalty.
If you are an attorny in centrain state, you had better stay in that state as long as you live. Otherwise you may need to go back to school or past another board exam.
If you want an abortion, you had better move to a state that abortion is legal.
If you need to rob a bank, you had better rob the local banks instead of federal banks, because the sentence is lighter.
If....

Why we all live in the same country but under so many different rules? Is this good for our country. I really wonder?

Republic of America certainly can make us more united and strong as a nation.