Mark Manson

And he explicitly said that you shouldn't categorize people and you shouldn't.

base a person's personality based on like one of these simple things that he identified.

Yet that did not stop people.

It was actually an American woman named Catherine Briggs who discovered Jung in around 1920, became really obsessed with his work, loved it, and took it upon herself to become the American English interpreter of Jung's work.

And so

She translated a bunch of his work.

She wrote a bunch of articles about him.

She popularized him in the American consciousness.

She had articles that appeared in the New Republic about him.

And so she was just talking about Jung all the time.

She really made a career out of spreading and proselytizing Jungian psychology to the American public.

Now, she had a daughter named Isabel Briggs Myers.

Now, Isabel was a novelist and she wrote some mystery novels.

had a modest amount of success.

But it wasn't until World War II, when women were being called into the workforce en masse, that there was a real need to quickly identify each woman's natural strengths and tendencies.

And Isabel,

saw this as an opportunity to create some sort of personality type system that would quickly identify what each woman was good at, what they were bad at, and so that they could be quickly allotted into a job or a line of work that could utilize their skills and talents effectively.

Now, of course, Isabel grew up with her mom constantly talking about Jung.

So Isabel relied on some of that early Jungian categories and functions that she had discovered.

And this is how you get the four spectrums of the MBTI system.