That's not the prompt--the prompt is

Yes, fair point. But you don't need to teach someone science to convey the message of EA. The message is basically "Apply your money to where it will do the most good, as best as you can determine". You can add a few negatives ("don't give to raise your status", "don't give to what tugs at your heart the hardest", etc.) and they will still be easily understood by a XV-century person.

What do you think GiveDirectly and/or open borders EAs do?

I think they concern themselves with welfare of people and not with success of commerce.