Psychologists suggest that to cure cruelty

The points put forward in the lecture "The Terror of Change"

1. 
   have changed scholars from a sense of optimism to one of gloom
   
2. 
   are, for the most part, accepted
   
3. 
   had not been considered by scholars previously
   
4. 
   caused much debate and disagreement
   

2. According to the writer, having no equivalents in the past

1. 
   analyses formulated by experts are open to discussion
   
2. 
   books on the world's problems cause a great deal of debate
   
3. 
   Third World megacities are not sufficiently aided
   

D) today's problems require new solutions