Where did the phrase tin foil hat come from?

This was first coined by Julian Huxley, In the story, the protagonist resists mind control by wearing a hat made of metal foil.

Let's make this clear: we need less tin foil hats and more transparency, by Enrique Dans, Enrique Dans

The Truth Behind the Tinfoil Hat—“Believe Me, It's True!”

How Google Autocomplete Algorithms about Conspiracy Theorists Mislead the Public

Tin Foil Hat Images – Browse 2,107 Stock Photos, Vectors, and Video

What sort of people are most likely to accuse other people of wearing tin foil hats? - Quora

The Republican Party's Midterm Wackadoodle Wave - The Atlantic

Heads-up, all you hat fans! This classic baseball cap features six-panels made of 100% brushed cotton. The bill molds to the shape you want and with

CafePress Other Hat Made of Tin Foil Cap Baseball Cap

The Freshest Tinfoil Hats for Conspiracy-Theorist Fashionistas

New Zealand freedom protesters wear tinfoil hats

My tin foil hat - by Ben Alexander - Transitions