I am unable to produce a summary of the requested article because the search results provided do not include the article titled "Investing in hope" from the journal Science, Volume 391, Number 6789, March 2026. The search results only contain links to various sources that use the phrase "investing in hope" in the context of funding research and promoting hope, but not the actual scientific article that you specified. In order to create an accurate and factual summary as per your requirements, I would need access to the full text of this particular article.