I absolutely don't think a sentient artificial intelligence is going to wage war against the human species.

The question that will decide our destiny is not whether we shall expand into space. It is: shall we be one species or a million? A million species will not exhaust the ecological niches that are awaiting the arrival of intelligence.

I think it's realistic to have hope. One can be a perverse idealist and say the easiest thing: 'I despair. The world's no good.' That's a perverse idealist. It's practical to hope because the hope is for us to survive as a human species. That's very realistic.

Sending Paris Hilton to jail for being the most loathed celeprosy lesion in the history of the species seems like a happening idea at first - forty-five days at Century Regional Detention Center is so the new thirty days at Promises Malibu! But it sets a dangerous precedent to jail celebs just because someone hates them.

And History will smile to think that this is the species for which Socrates and Jesus Christ died.

It is the great sadness of our species that we have not found a way to eliminate the conflict and to eliminate violence as a device to resolve our conflicts throughout the entire history of the human race.

Of all the species of literary composition perhaps biography is the most delightful. The attention concentrated on one individual gives a unity to the materials of which it is composed which is wanting in general history.

Hope is itself a species of happiness and perhaps the chief happiness which this world affords.

There are three species of government: republican monarchical and despotic.

Heaven and hell suppose two distinct species of men the good and the bad. But the greatest part of mankind float betwixt vice and virtue.

The reproduction of mankind is a great marvel and mystery. Had God consulted me in the matter I should have advised him to continue the generation of the species by fashioning them out of clay.

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.

I know a lot of people fear the rougher types who might be at a state school but surely it is better to know who they are and how to deal with them than for that kind of child to appear as a completely different species to yours.

Although we have in theory abolished human slavery recognized women's rights and stopped child labor we continue to enslave other species who if we simply pay attention show quite clearly that they experience parental love pain and the desire for freedom just as we do.

There are a lot of obstacles in the way of our understanding animal intelligence - not the least being that we can't even agree whether nonhuman species are conscious. We accept that chimps and dolphins experience awareness we like to think dogs and cats do. But what about mice and newts? What about a fly? Is anything going on there at all?

In a state therefore of great equality and virtue where pure and simple manners prevailed the increase of the human species would evidently be much greater than any increase that has been hitherto known.

There are two problems for our species' survival - nuclear war and environmental catastrophe - and we're hurtling towards them. Knowingly.