[ars]

> you could (and likely would) walk around taking obviously foolish risks without ever experiencing any consequences

Only things that are random on a quantum level cause world splitting.

Walking in front of a car for example is not random on a quantum level and would not cause multi-world effects.

In the popular consciousness multiple worlds means every single possibility exists. This is not true!

In fact there are very few macro effects that are caused by quantum randomness. Even if multiple worlds is true they are all identical except microscopically.

[rblatz]

It’s my understanding that radioactive decay is a quantum random.

Radioactive decay emits particles that can interfere with dna and cause cancer.

So some number of people would have/not have cancer in these many worlds. Not all these people would have profound impacts, but the background noise would start to add up quickly.