Investigation of Vampirism
I Am LegendThis flow follows Robert Neville’s movement from inherited vampire lore toward an evidence-based account of vampirism.
increasing
Bearing strength in each event
decreasing
Inherited Superstitions

A Supernatural Puzzle
Traditional Claims
Robert Neville knows that garlic, crosses, mirrors, stakes, and daylight affect the attackers, but he does not yet understand how.
Doubt
He notices that some legendary claims are false. The creatures do not become bats or wolves, and mirrors do not simply erase their images.
Starting Point
The contradiction between observation and legend creates the need for systematic inquiry.
Library Research

Reading the Evidence
Scientific Turn
Robert Neville visits the Los Angeles Public Library and gathers physiology, blood, bacteriology, and microscopy texts.
Connecting Facts
Blood circulation, lymphatic failure, sunlight, insects, and bacterial activity begin to form a single explanatory field.
Intellectual Risk
Research forces him to abandon the comforting simplicity of pure supernatural explanation.
Integrated Explanation

A Unified Theory
Physical Causes
Robert Neville concludes that some vampire effects arise from bacteria, oxygen exposure, blood dependence, and altered tissue behavior.
Psychological Causes
Other effects, including the cross and mirror responses, depend on belief, trauma, and cultural conditioning.
Achievement
His investigation does not restore the old world, but it gives the phenomenon a rational history.
January 1976
1976年4月7日
late 1976