NICCOLO TUCCI,who has been living in the United Slates since 1938 and who is now an American citizen, had the first look at his native land in fifteen years when he returned to Italy last spring. Much of what he saw appalled him. The “modernization” the desecration of the old monuments, the streamlining of roads as famous as the Appian Way, seem to him a betrayal of Italy’s great heritage. He learned that an Italian archaeologist, Antonio Coderna, was leading a movement in protest, and Mr. Tucci decided to carry the word to America. His first article, “The New Barbariansappeared in the June Atlantic.