In the center circle, write the word or thing being descrbed. Write the adjectives or adjective phrases in the outside circles.

Using phrases like "Darwinian selection" or "Darwinian evolution" implies there must be another kind of evolution at work, a process that can be described with another adjective.

In English, it's most commonly used as an adjective, in phrases like "guerrilla warfare" or "guerrilla marketing."