Author Brian Doherty has been found dead in a Bay Area park after a presumed fall.

The 57-year-old was found at Battery Yates, a historic landmark in Marin County’s Sausalito, last week, according to Reason Magazine, where he worked as a senior editor.

Doherty is believed to have fallen last Thursday night after attending an art gathering held atop the park’s historic concrete military defense structures, SFGATE reported.

He was widely recognized for writing extensively about the evolution of libertarian thought, most notably in his 2008 book “Radicals for Capitalism,” which traces the development of the modern American libertarian movement.

In a tribute, David Nott described him as the movement’s go-to historian, noting that he had a unique ability to vividly and thoroughly capture the personalities and stories that shaped libertarianism.

Doherty was born in Brooklyn in the late 1960s and grew up in Florida before moving to California in the 1990s.

It was in the Golden State that he was inspired by the Cacophony Society — a loosely organized, nationwide network of pranksters, urban explorers and artists — which later inspired events like Burning Man and SantaCon. It eventually leading him to write the book “This Is Burning Man: The Rise of a New American Underground.”

“Brian’s contributions to the art scenes in L.A. and San Francisco were monumental,” activist and author Chicken John Rinaldi said in Doherty’s obituary. “His passing leaves so many people and so many systems impoverished.”

The author was restricted in his movement and needed a cane to walk, which may have contributed to his fall, according to Reason.

He wrote articles published in dozens of newspapers and magazines, including The Washington Post, The Wall Street Journal, The Los Angeles Times, Mother Jones, Spin, National Review, The Weekly Standard and The San Francisco Chronicle, as well as The New York Post.