"Herd immunity is back" may sound grand but I feel it is unnecessarily provocative and such sentiments won't help to engage in a much needed societal discussion. Incidentally, it is inaccurate.
1/

'Herd immunity' is neither a strategy nor a policy. It simply describes the mechanism by which an epidemic wanes before everyone in a population has been immunised through vaccination or infection. As such, 'herd immunity' is part and parcel of any vaccination campaign.
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It is fairly unlikely we'll have 'infection blocking' vaccines available for everyone in the near future. This is even true for the richest nations on earth. This has been acknowledged by the UK government, which doesn't plan to vaccinate most of its population.
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As #COVID19 won't be eradicated any time soon, the question is what is the best strategy to minimise morbidity and mortality whilst controlling #COVID19. Those fall in a continuum ranging from indefinite suppression (Zero COVID) to preferential shielding of the most at risk.
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How to deal with #COVID19 is a complex question that has no unique answer, only painful tradeoffs. Using inflammatory language, politicising and demonising those who disagree with us on the best strategy to reduce harm and deaths is, I believe, unhelpful.
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1/ Some initial thoughts on personal moats:

Like company moats, your personal moat should be a competitive advantage that is not only durable—it should also compound over time.

Characteristics of a personal moat below:


2/ Like a company moat, you want to build career capital while you sleep.

As Andrew Chen noted:


3/ You don’t want to build a competitive advantage that is fleeting or that will get commoditized

Things that might get commoditized over time (some longer than


4/ Before the arrival of recorded music, what used to be scarce was the actual music itself — required an in-person artist.

After recorded music, the music itself became abundant and what became scarce was curation, distribution, and self space.

5/ Similarly, in careers, what used to be (more) scarce were things like ideas, money, and exclusive relationships.

In the internet economy, what has become scarce are things like specific knowledge, rare & valuable skills, and great reputations.
I’m torn on how to approach the idea of luck. I’m the first to admit that I am one of the luckiest people on the planet. To be born into a prosperous American family in 1960 with smart parents is to start life on third base. The odds against my very existence are astronomical.


I’ve always felt that the luckiest people I know had a talent for recognizing circumstances, not of their own making, that were conducive to a favorable outcome and their ability to quickly take advantage of them.

In other words, dumb luck was just that, it required no awareness on the person’s part, whereas “smart” luck involved awareness followed by action before the circumstances changed.

So, was I “lucky” to be born when I was—nothing I had any control over—and that I came of age just as huge databases and computers were advancing to the point where I could use those tools to write “What Works on Wall Street?” Absolutely.

Was I lucky to start my stock market investments near the peak of interest rates which allowed me to spend the majority of my adult life in a falling rate environment? Yup.