Advertising: New Boss for the Biggest

In its 104 years of existence, J. Walter Thompson Co., the world's largest advertising agency, has had exactly three chief executives—J. Walter Thompson, Stanley Resor and Norman H. Strouse. Last week Thompson's board of directors elected a fourth. Strouse, who has held the job for seven years, will retain his title of chairman, but he will give up day-to-day details to devote himself to long-range planning and industry speechmaking. Succeeding him as boss of the biggest: broad-shouldered Dan Seymour, 53, who has been JWT's president for the past three years.

Martian Invaders. Seymour's election was noteworthy in another sense. Traditionally, ad-agency...