Chapter 1 - Reading Flashcards
How is personality compared to human nature?
Personality is a variation of the general design for human nature.
It is as if evolution said “what if I try this?”
What did natural selection make humans?
Bipedal, brainy and live together in social groups
Genesis story (Adam and Eve)
Adam lived in isolation and wasn’t happy (needs to be social)
Eve made
Intellectual curiosity is what got them in trouble - tree of knowledge
When banished from Eden, it was their social need for each other and their brains that helped them
Are humans smarter than other animals?
Humans are smarter than other animals - other animals have at best a 4 year old human capacity
Do humans live in groups?
How does this relate to individual differences?
We all live in groups and use groups for everything
Individual differences most readily express themselves in social interaction between people
Pair bonding and intellect
Pair bonding requires brainpower - you have to monitor and adapt to the other person
Mammals and birds with big brains:mass ratios pair bond
Social brain hypothesis
Neocortex:group size
Humans may have evolved to deal with the complexities of social life: Who is in the group and how to behave with them.
There is a strong correlation between the size of the neocortex and the size of social groups the animal has.
Humans are the biggest
Eusocial creatures
Live in intricately coordinated, multi generational groups
Individuals will sacrifice for these groups, even at a cost tot themselves
Homo Habilus
When
Creatures first evolved bipedalism which allowed them to use their hands for food and objects
2.3 million years ago
half the brain size of us
Made stone tools for scavenging and scraping meat off bones
Eventually developed tools for hunting
Meat is more nutritious than plants
Meat became a staple
Scavenging and hunting require coordinated activity and therefore social groups
Home erectus
1 million years ago Learned about FIRE More brains Cooking made meat better tasting and more nutritious Cooking lead to campsites (Wilson 2012) Group members would use these as bases and divide jobs up between hunters, scavengers and women Is a proto human nest ALL Eusocial species have a nest Over time = home
Shared intentionality
If I want to work with you to accomplish a task, it is good for both of us if I know your intentions
Evolution has therefore provided my ability to imagine what might happen in others minds
We may also have evolved codes, laws and governments to facilitate working together
Homo sapians
Africa, 200000 years ago
Huge neocortex
Lived in hunter gatherer groups
Developed language and so everyone could articulate their feelings, thoughts and intentions which made them more eusocial
About 50000 years ago there was a big increase in culture including tools and tech which was passed down
10000 years ago this lead to agriculture and from this a further increased group size and more trade between groups etc
this all selects for social attributes
Weston Autrey
William Kyle Carpenter
Saved a man having a seizure when he fell onto subway tracks
held him in a ditch and pushed down while the train went over them
Said he did not think, just did
W. K. Carpenter threw himself on a grenade in afgan
Altruism
Can be confusing given natural selection
Reciprocal altruism
As humans evolved in groups, helping someone else might have given them the chance to pay you back later
This might improve your chances to reproduce
This likely doesn’t happen but could explain why the natural urge to help someone in distress has been selected for