From: Sapiens: a Brief History of Humankind (2011), by Yuval Noah Harari:
“…We are used to thinking about ourselves as the only humans, because for the last 10,000 years, our species has indeed been the only human species around. Yet the real meaning of the word human is “an animal belonging to the genus Homo“, and there used to be many other species of this genus besides Homo sapiens…”
Bill Bryson, in A Short History of Nearly Everything (2003) Chapter Twenty-Eight:
“Humans are put in the family Hominidae. Its members, traditionally called hominids, include any creatures (including extinct ones) that are more closely related to us than to any surviving chimpanzees. The apes, meanwhile, are lumped together in a family called Pongidae. Many authorities believe that chimps, gorillas and orangutans should also be included in the family Hominidae, with humans and chimps in a subfamily called Homininae. The upshot is that the creatures traditionally called hominids become, under this arrangement, hominins. (Leakey and others insist on that designation.) Hominoides is the name of the ape superfamily, which includes us.)”
“(Homo) Erectus was “the velociraptor of its day”, according to Alan Walker of Penn State University, one of the world’s leading authorities. If you were to look one in the eyes, it might appear superficially to be human, but “you wouldn’t connect. You’d be prey.” According to Walker, it had the body of an adult human but the brain of a baby.”
From: Homo Deus: a Brief History of Tomorrow (2015), by Yuval Noah Harari:
“Consider, for example, the following Freudian argument:
Armies harness the sex drive to fuel military aggression. The army recruits young men just when their sexual drive is at its peak. The army limits the soldiers’ opportunities of actually having sex and releasing all that pressure, which consequently accumulates inside them. The army then redirects this pent-up pressure and allows it to be released in the form of military aggression.
This is exactly how a steam engine works…
In the twenty-first century it sounds childish to compare the human psyche to a steam engine…”
From In Memory of Sigmund Freud (1939) by W H Auden:
They are still alive, but in a world he changed
simply by looking back with no false regrets;
all he did was to remember
like the old and be honest like children.