Final answer:
Aristotle proposed that all life was arranged in a hierarchy of increasing complexity.
Step-by-step explanation:
The Greek philosopher Aristotle proposed that all life was arranged in a hierarchy of increasing complexity. According to Aristotle, organisms were classified based on their level of complexity, with simpler organisms at the bottom and more complex organisms at the top. This concept of organization was later expanded upon by scientists like Carolus Linnaeus, who developed the modern system of biological classification. These early ideas about the organization and complexity of life were foundation stones that, over time, led to the more sophisticated understanding of biology and taxonomy that we have today.