Humans

 An internal conflict,

A type of civil war!

Friendly fire!

 A self-defeating process.

 Ever repeating itself,

Generation after generation.

 A cancerous race!

Fathered wars,

 Birthed Global warming,

 Invented Poverty.

Forever divided!

A degenerate creature.

 It's own worst nightmare.

 Marching slowly to its death

 Humans!