A gentleman reigns as king of his castle, defender of his domain.  Since civilization’s birth, what does any proper citadel need?  A flag.  Flags mark territory.  They declare sovereignty or affiliation.  Through symbols, shapes and colors, a flag tells a story to outsiders about the land and its people.   To insiders, a flag emphasizes unifying values and shared aspirations. You may have a mortgage.  You may mow the grass biweekly.  You even may have replaced the kitchen backsplash.  But, you do not own a house until you fly a flag on it.  What flag, you ask. This is not Fifteenth-Century Scotland: you do not need a coat of arms.  Instead, select the flag of an organization with which you associate, e.g., a university, the Marine Corps, or an athletic team.  Or, patriotically hoist the American flag.  Do not, however, fly...