We’ve built many new walls not from brick and mortar, but rather from bytes. The walls those emperors built have endured centuries of wear; they are visible. The walls we have built across the Web might be invisible, but they, too, will last for centuries. They are the walls of hate and shame whose manifestation lies in the polarization of peoples not only of different nations, but also of people within any nation.
There is no Reagan to say, “Mr. Gorbachov, tear down this wall.” There’s only you.