Chaos cheery and related things are described by way of differences be
tween traditional (linear) science and non-traditional (nonlinear) sci
ence. Differences described between linear and nonlinear models of sci
ence respectively include the following: quantitative vs qualitative,
analytic vs non-analytic, predictability vs unpredictability, fundamen
tal scaling vs scaling relations, and superposition vs emergence. Comm
on themes in non-traditional science are the existence of nonlinearity
, scaling relations, and unpredictability. Data are provided that show
that many social and psychological phenomena can be understood only t
hrough nonlinear modeling. It is concluded that as the old and new vie
ws of science coalesce, the newer mathematical tools will help make un
derstandable the irregular and erratic features of everyday life.