One of the few unalienable rights mentioned in the Declaration of Independence. Search that phrase and you'll find links to a movie by the same name. Here is the Wiki article on it.
Why am I writing on this? Because it comes up sometimes. Like when SquareSpace has a place where I'm supposed to add my Bio. That makes me think of the past, which I don't want to rehash here. Then I'm reminded of a quote from the Spike Jonez movie, "Her."
"The past is just a story we tell ourselves."
Prone to going off to search such things, I find this website: http://thoughtcatalog.com/jeremy-sheeler/2014/02/the-past-is-just-a-story-we-tell-ourselves/
Backing up to the root of that site, I find this: http://thoughtcatalog.com/kelly-joyce/2014/07/5-things-you-can-do-to-feel-happier-with-each-passing-day/
And, so it goes. Much is written about how to be happier these days. It makes me wonder how many people need this information and how sad a place is the world today.
The universe is a friendly place. That's my answer. Thank you for that question, Albert.