Biologists have debated how this behavior has evolved in these species.

Business ethics and the resulting behavior evolved as well.

The most fanciful theorists try to explain how all this behavior evolved.

It then becomes easier to see how this behavior could have evolved.

However, such behavior may or may not have evolved within the context of reproduction.

There is little understanding about how animal behaviour evolved through time to produce the human 'mind'.

As behavior, models, and standards for knowledge evolve, so can goals.

Some theorists believe that this behavior has evolved into a human instinct which is stronger in females than males.

Human behaviors have also evolved for the purpose of survival.

Why did this bizarre behavior evolve and what advantage does it confer?