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Ranked #8 on Hacker News with 142 points and 68 comments.

My father passed recently, and he was twice my age. I am approximately the same age that he was when I was born, and I am now “the old generation” - there’s no one left in the generation above me.

At the same time, I recently joined a company that skews younger-than-me. When I joined Google in 2011, I had just turned 30, and was in the mainstream demographics of Google in 2011. There were a bunch of more senior folks, with the very senior ones being in their 50s and having completed stints at Bell Labs. I admired a lot of these “greybeards” (even though this is a sexist term - what’s the right female equivalent? There were a few very senior female engineers that I would love to include).

So perhaps it is natural that I am reflecting on “what were the important realizations that I made since my early 20s that had a profound impact on the way I think about the world”? In some sense: What are the insights I had that made me “more mature”, for some positive definition of “mature”?

1. The importance of understanding your own incentive structure, and not believing everything you think.

I recently wrote a Twitter thread about the topic. Oppenheimer was very publicly guilt-ridden about the creation of the nuclear bomb, and von Neumann at some point quipped “some people profess guilt to claim credit for sin”. In my young years, particularly in situations when I had 0day that nobody else had, I agonized about the responsibility that comes with having 0day. Should I fix them? Should I use them for good? Will the world be harmed this way? Or that way?

In the end, it turns out that - while individuals matter - many ideas have a “time at which they are ripe”, and the actions of the individual matter less than the individual thinks in that moment. There is also almost no way to predict the ways in which what you do impacts the broader world.