I was looking at pictures of Batman and Detective Comics covers, and I was surprised because they didn't fit with some of my preconceived ideas about the Silver Age.

Conventionally, the Silver Age is said to start in the mid-50s. A date often given is the first appearance of the modern Flash in 1956. Then the Bronze age is supposed to start around 1970 and the Modern Age in the mid-80s.

My ideas about Batman in the different comic book ages were:

Golden Age: Dark, dangerous, brooding vigilante, heavily influenced by costumed vigilantes from pulp fiction, who occasionally might use guns and kill.

Silver Age: Very silly, lighthearted, childish and fun stories, colorful and often with a sci-fiction theme.

Bronze Age: Batman goes back to its darker, vigilante detective roots.

Modern Age: The current Batman, often darker and edgier than in the Bronze Age, but also open to more lighthearted depictions, in part thanks to the Bat-family.

What I think now, after looking at some of the art and stories:

Golden Age: The dark, menacing vigilante was there at the very beginning, but that version was somewhat softened right away. Using guns was immediately abandoned, and the early introduction of Robin less than a year after Batman's first appearance inevitably moderated the brooding tone, although the stories were still gritty and street-level. That changed gradually, and by the late 40s, long before the Silver Age was supposed to begin, the stories were already lighthearted juvenile fantasy rather than gritty. It seems like the Silver Age started for Batman much earlier than 1956.

Silver Age: The campy, silly, fun and colorful sci-fi adventures are there, but by the second half of the 60s there has been a sharp turn into darker, more mature stories and art, more like what I would associate with the Bronze Age. I had always thought that the Silver Age for Batman finished with the arrival of the Dennis O'Neil/Neal Adams team around 1970, but years before that the campy style of the Silver Age had been abandoned. Is this period in the second half of the 60s, with the arrival of editor Julius Schwartz, artist Carmine Infantino and writer John Broome considered to be part of the Silver Age?

The Bronze Age and Modern Age bring no surprises. There's a very convenient milestone in the mid-80s to mark the beginning of the Modern Age, with the publication of Frank Miller's The Dark Knight Returns, and Year One a bit later. Some people tend to ignore Batman stories written before this, which is a pity, because I really enjoy Bronze Age Batman. It gets the level of darkness just right for my taste, without overdoing it. Creator teams like O'Neil/Adams and Englehart/Rogers are high among my all-time favorites.