Full Idea
Nowadays philosophers concerned with intentionality divide into two camps. Internalists epitomise a traditional approach to thought, as intrinsic features of thinkers; externalists say it depends on contextual factors (environment or community).
Gist of Idea
Intentionality now has internalist (intrinsic to thinkers) and externalist (environment or community) views
Source
John Heil (From an Ontological Point of View [2003], 18.2)
Book Reference
Heil,John: 'From an Ontological Point of View' [OUP 2005], p.208
A Reaction
This is basic to understanding modern debates (those that grow out of Putnam's Twin Earth). Externalism is fashionable, but I am reluctant to shake off my quaint internalism. Start by separating strict and literal meaning from speaker's meaning.