Yang. Chinese symbol of heaven, light, male, positive, active. Yin.

Zenger, John. 1697-1746. US publisher. Libel acquittal based on being fact 1735, key to freedom of press.

Zeno of Elea. Paradox: Arrow can never reach its target because it progresses in ever decreasing fractions of distance remaining. ½,¼... First use of dialectic reasoning.

Zhdanov, Andrei. 1896-1948. Russian Politburo member. Created Cominform. Restricted Soviet cultural activities.