by Marshall Fritz, 1987. Retrieved from lairdwicox.com 05/25/07. </ref> In 1970, Denver advertising executive David Nolan invented the Nolan Chart to overcome the weakness of the outdated Left/Right political spectrum. | by Marshall Fritz, 1987. Retrieved from lairdwicox.com 05/25/07. </ref> In 1970, Denver advertising executive David Nolan invented the Nolan Chart to overcome the weakness of the outdated Left/Right political spectrum. |