Final answer:
The Linnaean system of classification helps establish the unity of life by organizing and categorizing living organisms based on their shared physical traits.
Step-by-step explanation:
The Linnaean system of classification, developed by Swedish botanist Carl Linnaeus in the 1700s, helps establish the unity of life by organizing and categorizing living organisms based on their shared physical traits. This system groups organisms into hierarchical levels called taxa, starting with the largest and most inclusive group called the kingdom and ending with the most specific group called the species. By organizing organisms in this way, the Linnaean system demonstrates the interconnectedness and evolutionary relationships between different species, highlighting the unity and diversity of life.