One of the joys of reading about history is the way in which each generation interprets the past through its own perspective. This isn’t simply new facts coming to light or official documents being unsealed — rather, it’s the historian’s equivalent of “the observer effect” in physics: It’s impossible to completely remove yourself from your own context and perspective. There is no such thing as objective history. This, in part, helps explain the position Sakamoto Ryoma (1836-67) holds in the pantheon of Japanese greats — every generation creates him anew.