Laurence -
Thanks for the well crafted essay! Some in this contest are not so easy or enjoyable to read.
I was amused to see that you and I both used the same quote from Martin Rees. There are other parallels between our essays and I hope you have a chance to read mine, The Tip of the Spear. I think we agree on the current risks and opportunities, and I would agree that avoiding catastrophe should be a first priority. But I also think there is a broader picture to be drawn from evolutionary and complexity theory - and a need to build consensus for a shared moral framework.
Looking forward to additional exchanges! - George