George didn&#x27;t originally intend that, and he also intended for land tax to replace all other taxes. I&#x27;d be interest to hear a source on the desirability of &quot;things like skyscrapers&quot;.<p>(Koolhaas argues that not only was the elevator essential for the development of the skyscraper, but the telephone was necessary too, since it obviated the need to leave the office during the day. Is the original requirement for density still valid today?)