As early as 1896, climate scientists had a quantitative estimate of the warming that CO2 would cause. We could have been building a movement that was concerned about our carbon emissions many decades earlier than we in fact did. And I think the same is just true with respect to developments in artificial intelligence,. With respect to engineering of new viruses. Yes, this is often more speculative than other things we could be doing. But even though we're acting on somewhat more speculative evidence, these trends are actually pretty reliable.