Originally Posted by
Khime
Confusing? Ha!
1930s to 1950s: The Golden Age of Comic Books. Many well-known characters were introduced, including Superman, Batman, Captain America, Wonder Woman and Captain Marvel.
1956 to 1970s: The Silver Age of Comic Books. Began in DC Comics with the introduction of Barry Allen as the Flash. Pre-Silver Age apperances of Batman, Superman, and Wonder Woman were explained to have occured on "Earth-2", which is also where Jay Garrick was the Flash and heroes formed the JSA; the Justice League was on "Earth-1", and soon other Earths are invented to explain other sets of comics, like Earth-3 (where heroes are villains and vice-verse), Earth-S (where Shazam comes from), and Earth-X (where the Nazi's won WW2), expanding into a multiverse of parallel worlds.
1970 to 1985: The Bronze Age of Comic Books. Darker plot elements and more socially relevant topics began to creep into superhero comics.
1985: Crisis on Infinite Earths. Everything before this in DC Comics is refered to as "pre-Crisis". Barry Allen dies, and Wally West becomes the Flash. The multiverse collapses into a single universe incorporating elements of several pre-Crisis universes. The JSA now becomes part of history, and never had Superman or Batman as members.
1994: Zero Hour. A follow-up to Crisis on Infinite Earths, it collapses inconsistent future timelines of the DC Univese into a new, unified future.
2005: Infinite Crisis. The pre-Crisis Golden Age Superman returns to try to make things right, as modern heroes have become too dark and conflicted compared to the lighter, more noble heroes of the past. Results in the Multiverse being restored; although "New Earth" retains much of the history of post-Crisis Earth, there is once again an Earth-2, Earth-3, Earth-5, Earth-10, etc.
2008: Final Crisis. Darkseid tries to overthrow reality, and Barry Allen returns.
2011: Flashpoint. Barry Allen tries to go back in time to stop his mother from dying, and breaks reality. When he is trying to fix it, he is contacted by a mysterious figure, telling him the world was split into three to weaken them for an impending threat, and must now be reunited to combat it. The DC, Veritgo, and Wildstorm universes are then merged, creating a brand new DC Universe: The New 52. In the New 52, heroes are now a relatively new thing, a lot of their shared history has been lost, and Wally West is now biracial.
2016: DC Rebirth. We discover what the "impending threat" is, and that it stole 10 years of history from the world just as Barry was fixing it, which is why so many relationships and characters were lost in the creation of the New 52. The DC Universe begins to shift to a form closer to pre-Flashpoint, with love and hope returning. Includes the return of the original Wally West from within the Speed Force, where he's been trapped since Flashpoint.