I have this extraordinary curiosity about all subjects of the natural and human world and the interaction between the physical sciences and the social sciences.

In his later work (from 1990 onward) his focus has shifted somewhat from the natural sciences to the human sciences partly under the influence of the work of Michel Foucault.  
Hacking Ian (May 2012). 1086/354775.

Ian Hacking CC FRSC FBA (born February 18 1936) is a Canadian philosopher specializing in the philosophy of science.