Richard M. Russell said 52 percent of the nation’s growth since the Second World War had (i)_____invention. He said, (ii)_____research, the government’s greatest role in assuring continuing innovation is promoting a strong, modern patent office. “Unless we can (iii)_____original ideas, we will not have invention,” Mr. Russell said. Speculating on the state of innovation over the next century, several inventors agreed that the future lay in giving children the tools to think creatively and the motivation to invent.