Maurice and Charles Saatchi
(1946- ) and (1943- )
Saatchi & Saatchi, London

With the award-winning London agency they opened in September 1970, “the” brothers went on a 16-year acquisition spree that created the world’s largest marketing conglomerate and permanently altered and redefined the U.S. advertising landscape.

http://adage.com/article/special-report-the-advertising-century/maurice-charles-saatchi/140187/

http://saatchi.com/en-us/book/