**Paul Wintrebert** (28 July 1867 – 3 May 1966) was a prominent French embryologist and a theoretician of developmental biology, renowned for coining the term “cytoskeleton” (cytosquelette) in 1931. As a Manifestor in Human Design, Wintrebert embodied the qualities of initiation and innovation, which were evident in his critical stance against the mutationist theory of evolution. His radical epigenetic views and his description of life processes reflect his Emotional Inner Authority, guiding him to make decisions based on his feelings and emotional clarity.

Wintrebert’s Human Design profile as a 3/5 indicates a natural inclination towards experimentation and learning through trial and error, coupled with a strong desire to share practical solutions with others. This is mirrored in his significant contributions to the field of biology, where he challenged existing paradigms and proposed new ideas, often seen as a “biochemical Lamarckism.”

In his 60s, Wintrebert published a trilogy that encapsulated his thoughts on life processes and the essence of living beings: *Le vivant créateur de son évolution* (The living being is the creator of his own evolution) (1962), *Le développement du vivant par lui-même* (The self-development of the living being) (1963), and *L’existence délivrée de l’existentialisme* (Existence delivered from existentialism) (1965). His work reflects the themes of his Right Angle Cross of The Unexpected, emphasizing the unpredictable nature of life and evolution.

Wintrebert passed away at the age of 98, leaving behind a legacy that continues to influence developmental biology and evolutionary theory. His channels, including 64-47 (the channel of the mental activity), 7-31 (the channel of leadership), 12-22 (the channel of openness and communication), and 39-55 (the channel of emotional depth), further illustrate his complex and multifaceted approach to science and philosophy. Born in Lille, France, his life and work remain a testament to the power of creative thought and the importance of emotional clarity in the pursuit of knowledge.