This will be a brilliant paper on the evolution of cooperation between groups as exemplified by #bonobos and bottle nose #dolphins (they are not always nice, don't be kidded, selfish genes in action!)

https://royalsocietypublishing.org/rspb/article/293/2067/20252812/481093/What-can-we-learn-from-bonobos-and-bottlenose?guestAccessKey=4db4780c-5b65-4e9b-94d7-66c08622dd74