Comment by zahlman

> If we had the technology to maintain 0% inflation, we would do that. We can't, and rather than risk deflation we instead target low positive inflation.

I don't think this is quite right. My understanding is that a low positive inflation would be targeted anyway, because it stimulates the velocity of money; i.e. there's a downside to hoarding, since you need to beat inflation to come out on top. So people will be willing to invest to at least some extent in risk assets, or to buy things now rather than later.

Which, yes, makes inflationary spirals possible, but they've proven less damaging. The inflation numbers seen in regimes that actually collapsed as a result are absolutely dizzying; whereas the deflation seen in the Great Depression was... significant, but not nearly comparable.