Deep Tyagi

An early pioneer of family planning in India and elsewhere, he was a champion of the program under the premierships of Jawaharlal Nehru, Lal Bahadur Shastri, and the initial period of Indira Gandhi.

He invented the now-pervasive (in India and some other countries) "Red Triangle" symbol as a branding effort to familiarize and popularize the idea of family planning.

[citation needed] Part of the mission statement of the present-day foundation, DKT International, which was named in his honour, reads: "He was 41 years old at the time of his death, but had already made a major contribution to his country's family planning effort.

It was he who was largely responsible for the design and dissemination of a massive communication program that brought awareness and knowledge of family planning to hundreds of millions of Indians.

He began his work at a time (1966) when modern contraceptive methods were virtually unknown in rural India.