During the 1970s, Ogilvy & Mather acquired numerous other agencies: including S.H. Benson, one of its original sponsors, in 1971;
Scali, McCabe, Sloves in 1976; and Cone & Weber in 1977.
[15] Another acquisition, Hodes-Daniel, resulted in the establishment of the agency's direct-response service, called Ogilvy & Mather Direct, in 1976. It was renamed OgilvyOne Worldwide in 1997.
[17] The agency's growth through acquisitions was not led by Ogilvy, who feared the differing philosophies of the acquired agencies would undermine Ogilvy & Mather's culture and advertising beliefs, which he called the "True Church".
[25][26] After moving permanently to his French castle
Château de Touffou in 1973, David Ogilvy stepped down as chairman and became Worldwide Creative Head in 1975.