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I’m glad you wrote this! Movement-building is an important complement to financial investing, and can benefit the future in many of the same ways.
I believe your model gives this result because of the constraint that you have to either spend or invest all of your salary in each period. If you allow spending greater than 0% or less than 100% of your salary, I believe you will get the result that you maximize the number of longtermists by spending some fixed proportion of your salary in each period. Alternating between periods is a way of approximating this.
I added related functionality to your script here: https://github.com/michaeldickens/public-scripts/blob/master/movement-building-model.py
Also, there is a bug in the
invest
function,money += (money + salary) * market_rate
should bemoney = (money + salary) * market_rate
.This is awesome, you’re completely right and I’m totally updating my post with your model.
It definitely does strike me as there needing to be a lot of continued longtermist research and field-building to allow us to be in a good position to deploy a large amount of capital at a critical time. It’s not easy to deploy capital overnight.
Sorry if this is a strawman of the “invest to give later” argument or something already addressed, but I think it’s important to put out there if it hasn’t been already.
I emphatically agree that we could be in a much better position to productively deploy capital, and that there may be significant room for improvement here.
I’m not sure how relevant this is to “give now vs. later”. At first glance, it seems like a key question might be what timeframe we’re thinking about when considering “giving later”.
If it’s on the order of a few decades, then I agree it would be somewhat farcical to say we should just wait. E.g., if we thought there’d be some pivotal AI-related moment in 2050, then “let’s invest all capital and not do anything until 2040” would strike me as an obviously bad strategy.
If, on the other hand, the idea is to use the capital in hundreds of years, then I’m less sure (but then it also becomes harder to see if we can successfully invest over such long time horizons).
Thank you for raising some additional considerations against giving later. I think this is really valuable for the ongoing discussion that seems to be strongly tilted in favor of investing and giving later.
Even beyond your argument for movement growth, there seem to be many other intuitive considerations where similar arguments could be made. For instance, you consider that “converting” longtermists is an activity that is not only related to money but also to time and room for growth.
You need time to convert dollars into results given that there are generally strong limitations to room for more funding that is tied to the current allocation of resources in the world. I would guess one could model this as some kind of game where at each time point t you can effectively invest x amount into cause y where x is a function of cumulative money spent on cause y. It could be plausible to model this as a gaussian function (i.e., a bell curve) where money invested in the beginning leads to strong growth in room for more funding in the next round and then declines again at some point when full saturation (i.e., all money that could reasonable be spent is spent) is approached. Interestingly, this is both an argument for giving now and giving later as there is limited room where money could be spent effectively.
Going beyond this “simple” view, it would also be interesting to model how problems grow over time as they are not addressed. The most obvious example is climate change. If somehow a US president in the 80s could have been convinced to shift policy towards renewables… the problem would have likely required much less resources overall. This indicates that the money required to be spent on problems is a function of the time at which it is discovered and how much resources are directed to it over time.
I am not a mathematician but if any of this is remotely plausible, I am not sure that the thinking so far has considered such complications (i.e., at least I haven’t seen models that model these things but I also haven’t been searching in depth) and at least my intuition tells me that integrating such consideration could radically tip the balance toward a strong preference for giving as early as reasonable and provide a good argument for investing into infrastructure that would help us identify and address problems effectively as they emerge.
This could be an interesting topic for a PhD with simulations chops. Or even a benchmarking platform where different agent strategies can compete against each other.[1]
See Ketter, W., Peters, M., Collins, J., and Gupta, A. 2016. “COMPETITIVE BENCHMARKING: AN IS RESEARCH APPROACH TO ADDRESS WICKED PROBLEMS WITH BIG DATA AND ANALYTICS,” MIS Quarterly (40:4), p. 34.