But it is Boyd and Richerson who ended up writing a book, in 1985, called Culture and the Evolutionary Process, which is a highly technical book, but really lays out a framework for thinking about the interaction between genes and culture — how culture can give rise to different kinds of social phenomena, how it can explain human cooperation.
It says how long ago something was said, so you can tell last month
from 2014 without doing the arithmetic. Full and green is recent; it
drains and cools as the date gets older, and empties completely at about
6 years.
5d5 days ago
8mo8 months ago
2yr2 years ago
4yr4 years ago
9yr9 years ago
A striped bar means the date itself is an estimate — the source did
not carry an exact one. An entry with no date at all gets no bar.