为什么说the red badge of courage是stephen Crane的最伟大的作品?

This novel is known for its distinctive style, which includes realistic battle sequences, repeated use of color imagery, and ironic tone. It is also notable for its use of what Crane called a "psychological portrayal of fear" and allegorical and symbolical qualities. Several of the themes that the story explores deal with maturation, heroism/cowardice, and the indifference of nature.