1940s: “Battle for Womanhood”
Wonder Woman vol 1 #5, by William Moulton Marston and HG Peter
The fact is, Wonder Woman is never better than in the Golden Age, when the book was a pure expression of the philosophies of its creator, William Moulton Marston. Every panel is infused with metaphors for Marston's ideas about feminism, rehabilitation of criminals, and “loving submission.” That might sound boring until you realize these ideas were wrapped in stories about men from Mars, gorillas transformed into humans, Nazis stealing milk, and giant kangaroos that can jump into space.
Much hay has been made about elements of bondage and other sexual fetishes in the early days of the book, but if you read the actual comics and not just a poorly researched listicle on a click-baitier website than this, you'll see that the sexual elements are pretty much just subtext, and the bondage is, for Marston, less about sex than about a metaphor for men's oppression of women.
The selection here is a great representation of the raw creativity of this era, featuring the first appearance of recurring villain Dr Psycho in a story about ectoplasm that would make Mike Mignola jealous, a solo adventure by Wonder Woman's sorority girl sidekick Etta Candy, and a story about the Sky Kangas jumping to Mars. Hard to beat.
Wonder Woman's earliest adventures can be found in The Wonder Woman Chronicles.
Best of the rest: “Introducing Wonder Woman/Wonder Woman Arrives in Man's World” (All-Star Comics #8, Sensation Comics vol 1 #1), “The Menace of Dr Poison” (Sensation Comics vol 1 #2), “The Coming of Paula von Gunther” (Sensation Comics vol 1 #4), “The Milk Racket of Paula von Gunther” (Sensation Comics vol 1 #7), “Mars Is Triumphant!” (Wonder Woman vol 1 #2)