‘Replaceability’ isn’t as important as you might think (or we’ve suggested)

When we started 80,000 Hours, one of the key ideas we presented was the replaceability argument:
Suppose you become a surgeon and perform 100 life saving operations. Naively it seems like your impact is to save 100 people’s lives. If you hadn’t taken the job, however, someone else likely would have taken it instead. So your true (counterfactual) impact is less than the good you do directly.
I still think this is a good argument, but I’m not sure how relevant it is when comparing real career options.
In particular, I see the argument often being used incorrectly in the following two ways:
- Ignoring direct harm: Suppose you’re considering taking a job that some people think is harmful (e.g. certain parts of the financial sector) in order to donate, do advocacy or build skills. You reason “if I don’t take the job, someone else will instead, so the potential harm I’ll do directly doesn’t matter”.
Ignoring direct impact: Suppose you’re considering working at a high-impact nonprofit. You reason “if I don’t take the job, someone else will instead, so I won’t have much impact.”
I disagree with both of these claims in most circumstances. Why?
Wealth inequality globally is incredibly high. Perversely, this can be an argument in favour of working in finance.



When I was an undergraduate I came to fully understand the depth of the world’s problems: tens of billions of animals were suffering in factory farms, humanity faced the risk of catastrophic nuclear war, billions continue to live in horrendous poverty, and that was just the start. I wanted to solve these problems, but when I tried to take concrete steps I mostly felt powerless and frustrated.
Pooja Chandrashekar is a good demonstration that sometimes the best way to show people you can achieve amazing things is just to achieve amazing things. (Photo by J. Lawler Duggan/For The Washington Post)


Would Angelina Jolie have been as successful if her father wasn’t Jon Voight?


