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Wonder Woman is inarguably the most famous female superhero in the history of comic books, but she wasn’t the first. Comic book historian Trina Robbins found that the earliest costumed heroine was the Woman in Red, a policewoman named Peggy Allen who wore a red robe and mask to fight crime.
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Tim Hanley (Wonder Woman Unbound: The Curious History of the World's Most Famous Heroine)