Until now extinction events were all created by natural forces. Over immense periods of time, we have reached our current time which scientists have call the Holocene. As David Attenborough said,
“the Holocene has been one of the most stable periods in our planet’s history. For 10,000 years the average temperature has not wavered by more than 1ºC. And for this time the great diversity of life on this planet has been attuned to this stability. Phytoplankton in the ocean and forests at the surface have helped achieve this stability by locking away carbon. Great herds have kept the plains fertile by fertilizing the soils. Mangroves and coral reefs along thousands of miles of coasts have supported species that when they mature will range into open waters. A thick belt of jungles around the earth’s equator helps to capture as much of the sun’s energy as possible adding oxygen to the earth’s air currents. And the extent of the ice at the poles has been critical, reflecting sunlight from its white surface cooling the whole earth. The biodiversity of the Holocene helped to bring stability. The entire world settled into a gentle reliable rhythm—the seasons. On the tropical plains the dry and rainy seasons would switch every year like clockwork. In Asia winds ensured the monsoons would be created on cue. In the north the temperatures would lift in March and remain high until they would sink bringing autumn. The Holocene was our Garden of Eden. It was so reliable that it gave our own species a unique opportunity. We invented farming. We learned to exploit the seasons to produce food crops. The history of all human civilization followed, each generation able to develop and progress only because the living world could be relied upon to deliver us the conditions we needed. The pace of evolution was unlike anything to be found in the fossil record.”
At least until now. This worked astonishingly well for millennia and humans were the prime beneficiaries of this stability. Like all other creatures we evolved along with the system. Sadly, this did not last.
As Attenborough said,
“Our intelligence changed the way in which we evolved. In the past animals had to develop some physical ability to evolve. With us, an idea could do that. And the idea could be passed from one generation to the next. We were transforming what a species could achieve.”
Attenborough thinks that he grew up at exactly the right time. I grew up more or less the same time. I started a little later than he did. They were halcyon times. Thanks to air travel which emerged during his life time he was one of the first to travel around the world to see exactly how life could evolve thanks to the gentle conditions brought about by the Holocene epoch. I too have been lucky to travel around the world on a short but glorious sabbatical. He and I have been lucky.
It is now beginning to become clear that these halcyon times are in danger. And the cause is, again, us. Our activities are threatening this gentle time. There is still time for us to change course, though a lot of damage is already baked in. The worst could be avoided, but it will require a brand-new attitude to nature. Or perhaps an old attitude to nature which more of us need to adopt. I intend to blog about that. But the key is changing our current attitude to nature which is leading us towards serious dangers.
What do water lilies have to do with this? Everything.