Final answer:
The eight-word statement that references humans as enemies is 'Evil is the nature of mankind.' This concept discusses the complexity of human nature and the potential for internal and external conflict within society.
Step-by-step explanation:
The eight-word statement that references humans as the enemies is:
Evil is the nature of mankind.
Throughout history, there have been various perspectives on the inherent nature of humans. Some argue that humans have a natural inclination towards evil, while others believe in the existence of inherent goodness. The quote you provided reflects the belief that evil is ingrained in human nature.
However, it is important to note that this is just one perspective, and different philosophers, scholars, and thinkers have presented contrasting viewpoints on this topic.