Concerning Matters of Fire and Ice.

Timestamps:

John Campbell biography, non-spoiler discussion (0:00)

spoiler summary and discussion (34:21)

John Campbell's legacy on science fiction (1:08:27)

Bibliography:

Ashley, Mike - "The Time Machines: The Story of the Science-Fiction Pulp magazines From the Beginning to 1950" (2001)

Bleiler, Everett - "Science-Fiction: The Gernsback Years" (1998)

Davin, Eric Leif - "Pioneers of Wonder: Conversations With the Founders of Science Fiction Hardcover" (1999)

Silverberg, Robert and Nevala-Lee, Alec - "Frozen Hell: Introduction and Foreword" (2019)

Tymn, Marshall B. and Ashley, Mike (eds.) - "Science Fiction, Fantasy and Weird Fiction magazines" (1985)