A great many cities are experiencing difficulties which are nothing new in the history of cities, except for in their 62. ______ scale. Some cities have lost their original purpose and have not found new one. And any large or rich city is going to 63. ______ attract poor immigrants, who flood in, filling with hopes 64. ______ of prosperity which are then often disappointing. There are backward towns on the edge of Bombay or Brasilia, just as though there were on the edge of seventeenth-century 65. ______ London or early nineteenth-century Paris. This is new is 66. ______ the scale. Descriptions written by eighteenth-century travelers of the poor of Mexico City, and the enormous contrasts that was to be found there, are very similar to descriptions 67. ______ of Mexico City today-the poor can still be numbered in millions. The whole monstrous growth rests on economic prosperity, but behind it lies two myths: the myth of the city as a 68. ______ promised land, that attracts immigrants from rural poverty 69. ______ and brings it flooding into city centers, and the myth of the 70. ______ country as a Garden of Eden, which, a few generations late, sends them flooding out again to the suburbs. 71. ______