And if so, where do you keep copies; safe deposit box, desk drawer, with a trusted friend, etc.?
Oddly, I find myself without a manifesto. 
Anyone care to share their experiences having a ghost writer author their manifesto? Asking for a friend, here.
You mean a biography. A manifesto is an intentional publication, usually by an organization. A personal manifesto is little more than a resume.
I am manifestless and likely to remain so. Guess it’s my destiny.
Yeah, I’ve written up a few things of that nature. Mostly in the form of several personal moral oaths. As one example, I am sworn not to kill vertebrates. As another example, I’ve got a clause in my will that, if I am murdered, I do not wish my murderer to be executed.
A bunch of unrelated clauses, but they sum up to my manifesto.
(Does that make it a multifesto?)
Hey, I’m damn good. Insightful and, if necessary, creative. So if you need a ghost-writer for your manifesto, I’m 100% open to the proposition. It’s like this: if you die and I don’t get paid, at least I got to look into your morbid soul before everyone else lost the chance.
I have an unwritten manifesto, as befits a man determined to do as little as humanly possible.
Manifesto? Not really. More like a loose collection of Post-Its.
Wow. I’ve got a clause in my will as well. It states that, should I be murdered, all my possessions shall go to the person(s) who kill the sumbitch that killed me!