A Quote by Carl Sagan

We are the first species to have taken our evolution into our own hands. — © Carl Sagan
We are the first species to have taken our evolution into our own hands.
We are at a crossroads in human history. Never before has there been a moment so simultaneously perilous and promising. We are the first species to have taken evolution into our own hands.
...we sacrifice other species to our own not because our own has any objective metaphysical privilege over others, but simply because it is ours. It may be very natural to have this loyalty to our own species, but let us hear no more from the naturalists about the "sentimentality" of anti-vivisectionists. If loyalty to our own species - preference for man simply because we are men - is not sentiment, then what is?
For our own species, evolution occurs mostly through our behavior. We innovate new behavior to adapt.
At this early stage in our evolution, now through our infancy and into our childhood and then, with luck, our growing up, what our species needs most of all, right now, is simply a future.
Like all animals, human beings have always taken what they want from nature. But we are the rogue species. We are unique in our ability to use resources on a scale and at a speed that our fellow species can't.
The quality of our reading is not only an index of the quality of our thought; it is our best-known route to developing whole new pathways in the cerebral evolution of our species.
Our own species evolved under the influence of group selection, as Darwin emphasized when he discussed the evolution of altruism.
My aim is to advocate that we make this mental switch in respect of our attitudes and practices towards a very large group of beings: members of species other than our own - or, as we popularly though misleadingly call them, animals. In other words, I am urging that we extend to other species the basic principle of equality that most of us recognize should be extended to all members of our own species.
Protecting our future on this planet depends on the conscious evolution of our species.
When biological technology becomes further advanced, human beings as we know them, will become a modified species. If we as human beings fail to include the possibility of this development in our overall, social evolution we will witness the decline of our species
Each of these [bacterial] species are masterpieces of evolution. Each has persisted for thousands to millions of years. Each is exquisitely adapted to the environment in which it lives, interlocked with other species to form ecosystems upon which our own lives depend in ways we have not begun even to imagine.
The first world is going to have to account for this sort of horrible poverty in our midst. We have to, first of all, become aware of it. We have to take responsibility for it. And then we have to do something about it for our own freedom, for our own salvation, for our own humanity.
We will walk on our own feet; we will work with our own hands; we will speak our own minds... A nation of men will for the first time exist, because each believes himself inspired by the Divine Soul which also inspires all men.
The First Amendment's protections have always put a great deal of responsibility in our hands: not only to respect the power of our own speech, but also to respect that same power in the hands of people we despise.
The earth has continued to change, from rapid climatic changes that have caused the glaciers and the ice sheets to basically bulldoze the landscape and cause species compression in the tropics and cause mass species extinction - you know, all these huge changes. In terms of evolution, every species is doomed to eventual extinction. The natural world is constantly changing. So, to deal with "environmental problems," in quotes, totally misses the issue. That is not the way we want to define our problem if we're going to find our solution.
There is no law of progress. Our future is in our own hands, to make or to mar. It will be an uphill fight to the end, and would we have it otherwise? Let no one suppose that evolution will ever exempt us from struggles. 'You forget,' said the Devil, with a chuckle, 'that I have been evolving too.
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