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THREAD: 12 Things Everyone Should Know About IQ

1. IQ is one of the most heritable psychological traits – that is, individual differences in IQ are strongly associated with individual differences in genes (at least in fairly typical modern environments). https://t.co/3XxzW9bxLE


2. The heritability of IQ *increases* from childhood to adulthood. Meanwhile, the effect of the shared environment largely fades away. In other words, when it comes to IQ, nature becomes more important as we get older, nurture less.
https://t.co/UqtS1lpw3n


3. IQ scores have been increasing for the last century or so, a phenomenon known as the Flynn effect. https://t.co/sCZvCst3hw (N ≈ 4 million)

(Note that the Flynn effect shows that IQ isn't 100% genetic; it doesn't show that it's 100% environmental.)


4. IQ predicts many important real world outcomes.

For example, though far from perfect, IQ is the single-best predictor of job performance we have – much better than Emotional Intelligence, the Big Five, Grit, etc. https://t.co/rKUgKDAAVx https://t.co/DWbVI8QSU3


5. Higher IQ is associated with a lower risk of death from most causes, including cardiovascular disease, respiratory disease, most forms of cancer, homicide, suicide, and accident. https://t.co/PJjGNyeQRA (N = 728,160)
This month I’m turning 22.

To celebrate, here are the 22 best threads I’ve found on Twitter this year.

Mostly about:

•Life/purpose
•Startups
•Entrepreneurs
•Writing
•Clarity of thought

If I see more interesting threads, I will add to this list.

Enjoy!

1. @ryanstephens: Need tips on growing a newsletter, mastering Twitter, writing online?

@ryanstephens breaks down a podcast discussion between @davidperell and @nathanbarry

Here’s what you can


2. @jackbutcher: How to separate your time from your income

•Explore the market
•Build equity
•Build products and services
•Scale your reputation
•Break the matrix

A fantastic thread complete with helpful


3. @AlexAndBooks_: I love to read.

Here is a great thread on 10 fantastic books.

Includes a short summary of each.

Don’t just take it from me, this is straight from the legend: @AlexAndBooks_


4. @m_franceschetti My biggest revelation in 2020 was the importance of sleep.

Here, @m_franceschetti founder of @eightsleep gives us his eight sleep hacks to improve sleep for 2021.

Do these and your productivity will

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First thread of the year because I have time during MCO. As requested, a thread on the gods and spirits of Malay folk religion. Some are indigenous, some are of Indian origin, some have Islamic


Before I begin, it might be worth explaining the Malay conception of the spirit world. At its deepest level, Malay religious belief is animist. All living beings and even certain objects are said to have a soul. Natural phenomena are either controlled by or personified as spirits

Although these beings had to be respected, not all of them were powerful enough to be considered gods. Offerings would be made to the spirits that had greater influence on human life. Spells and incantations would invoke their


Two known examples of such elemental spirits that had god-like status are Raja Angin (king of the wind) and Mambang Tali Arus (spirit of river currents). There were undoubtedly many more which have been lost to time

Contact with ancient India brought the influence of Hinduism and Buddhism to SEA. What we now call Hinduism similarly developed in India out of native animism and the more formal Vedic tradition. This can be seen in the multitude of sacred animals and location-specific Hindu gods