COMPARATIVE COURTESY: Mark Twain coined the phrase “the Gilded Age” to describe the late 19th century. By this he meant that the period was glittering on the surface but leaden underneath. Millions of Irish, Italian, German, Polish, Hungarian, Russian Catholics, Orthodox Christians and Jews flooded into New York City following the Civil War. The Fifth Avenue elite took the lead in forging Americans out of what they considered barbarians. Central to this mission to Americanize and “civilize,” was the proper way to interact with friends and strangers. Join Dr. Ronald Brown for the first in a series of four lectures. 3 p.m.