Born on This Day: April 1

English physician whose demonstration of blood circulation transformed anatomy, physiology, and modern medicine.

Prussian statesman whose diplomacy and wars unified Germany and reshaped the European balance of power.

Russian composer and pianist whose richly expressive works became central to the late Romantic repertoire.

American actor and makeup artist whose transformative performances helped define silent horror and character acting.

American psychologist whose hierarchy of needs and humanistic approach influenced psychology, education, and management.

Canadian television producer whose creative leadership helped establish modern British drama and co-created Doctor Who.

Kenyan environmentalist and democracy advocate who founded the Green Belt Movement and linked conservation with women’s empowerment.

American author and critic whose innovative science fiction and cultural writing expanded the possibilities of speculative literature.