Researchers like Michael Tomasello have asked how it came to be that humans are so good at cooperating (yes, although we may sometimes get a different impression, humans are indeed cooperative, compared to other species) and his answer to that question had to do with the widespread “Man the Hunter hypothesis”, the idea that men needed to cooperate in order to hunt large game.
The article below reports that anthropologist Kristen Hawkes now found that “it turns out, grandmothers were more important to child survival than fathers. Mom and grandma were keeping the kids fed. Not Man the Hunter.”
This has significant theoretical repercussions which the article outlines. It’s not directly an article about meetings, but fascinating to see how we can thank our grandmothers for our capacity for having successful meetings. The down side, of course is that this capacity also makes us suffer when we collectively fail to make it real. 
Here is the article by John Poole: Why Grandmothers May Hold The Key To Human Evolution
Thanks, John!