Stopping spam and spreading democracy

More widespread use of encryption by email users could eventually contribute to both of these goals. 
  1. More people start encrypting email.  This makes email private (like a letter rather than a postcard), unless the FBI, your boss, or your ex-husband has installed a keystroke logger on your computer (perhaps by emailing it as a computer virus). 
  2. Email encryption becomes nearly universal in democracies.  (In fact, that's one way to recognize a democracy.)  Spam is never encrypted, because each recipient has a different public key, so it would take too much computer time.  People start sending all unencrypted mail to the trash.  No more spam.
  3. Countries that presently ban cryptography either drop out of the information economy or start allowing it.  Instant freedom of the press.  They may still have the guns, but if they no longer have a monopoly on information, then greater political freedom is just a matter of time.