Jean William Fritz Piaget (UK: / p i ˈ æ ʒ eɪ /, US: / ˌ p iː ə ˈ ʒ eɪ, p j ɑː ˈ ʒ eɪ /, French: [ʒɑ̃ pjaʒɛ]; 9 August 1896 – 16 September 1980) was a Swiss psychologist known for his work on child development.Piaget's theory of cognitive development and epistemological view are together called "genetic epistemology".. Piaget placed great importance on the education of ...

Abigail Pierrepont Johnson (born December 19, 1961) is an American billionaire businesswoman, and the granddaughter of the late Edward C. Johnson II; the founder of Fidelity Investments. Since 2014, Johnson has been president and chief executive officer (CEO) of American investment firm Fidelity Investments (FMR), and chair of its international former sister company …