ience has proved that the fundamental traits of every
individual are indelibly stamped in the shape of his body, head, face
and hands--an X-ray by which you can read the characteristics of any
person on sight._

The most essential thing in the world to any individual is to understand
_himself_. The next is to understand the other fellow. For life is
largely a problem of running your own car as it was built to be run,
plus getting along with the other drivers on the highway.

From this book you are going to learn which type of car you are and the
main reasons why you have not been getting the maximum of service out of
yourself.

Also you are going to learn the makes of other human cars, and how to
get the maximum of co-operation out of them. This co-operation is vital
to happiness and success. We come in contact with our fellowman in all
the activities of our lives and what we get out of life depends, to an
astounding degree, on our relations with him.

Reaction to Environment

The greatest problem facing any organism is successful reaction to its
environment. Environment, speaking scientifically, is the sum total of
your experiences. In plain United States, this means fitting
vocationally, socially and maritally into the place where you are.

If you don't fit you must move or change your environment to fit _you_.
If you can't change the environment and you won't move you will become a
failure, just as tropical plants fail when transplanted to the Nevada
desert.

Learn From the Sagebrush

But there is something that grows and keeps on growing in the Nevada
desert--the sagebrush. It couldn't move away and it couldn't change its
waterless environment, so it did what you and I must do if we expect to
succeed. It adapted itself to its environment, and there it stands, each
little stalwart shrub a reminder of what even a plant can do when it
tries!

Moving Won't Help Much

Human life faces the same alternatives that confront all other forms
of life--of adapting itself to the conditions under which it must live
or becoming extinct. You have an advantage over the sagebrush in that
you can move from your city or state or country to another, but after
all that is not much of an advantage. For though you may improve your
situation slightly you will still find that in any civilized country the
main elements of your problem are the same.

Understand Yourself and Others

So long as you live in a civilized or