Some human domiciles are 1,000 years old or more. Several on Long Island date back to the late 1600s. Most houses, however, have lost their sense of permanence. Fifty years ago, one would never raze a house to build another one unless it was severely storm damaged or ravaged by fire. Nowadays, houses built in the last quarter of the 20th century are falling to new, larger ones right and left. Houses have lost their sense of permanence just as we who live in them have lost our sense of immortality.