The Letter

Why This Exists

Twenty-five years of work across enterprise technology, psychedelic medicine, impact investing, and regenerative capital. This site is the attempt to make sense of it — to show how the threads connect, where the patterns lead, and what it all means for what comes next.

Tony Greenberg has been in the room when billion-dollar decisions were made, when FDA breakthrough therapies were filed, when communities were built and broken. The letter is the context for all of it.