Question

guess you'll never become a samurai now, huh, Manjiro-chan?"

"Why not?" Manjiro asked.

"Even if we should get home, you know very well you can't be. You weren't born into a samurai family. You were born a fisherman's son and you will be a fisherman, and any sons you have, they also will be fishermen. That is the way it is; that is the way it has always been; that is the way it will always be."

What does this dialogue tell you about the time and culture of the characters?

Things do not change.
The characters might not get home.
Manjiro wants to be a samurai.
Manjiro is a fisherman.