Roget was inspired by the Utilitarian teachings of Jeremy Bentham and wished to help "those who are painfully groping their way and struggling with the difficulties of composition. Roget's schema of classes and their subdivisions is based on the philosophical work of Leibniz (see Leibniz § Symbolic thought), itself following a long tradition of epistemological work starting with Aristotle.
- CLASS I. WORDS EXPRESSING ABSTRACT RELATIONS
- SECTION I. EXISTENCE
- SECTION II. RELATION
- SECTION III. QUANTITY
- SECTION IV. ORDER
- SECTION V. NUMBER
- SECTION VI. TIME
- SECTION VII. CHANGE
- SECTION VIII. CAUSATION
- CLASS II. WORDS RELATING TO SPACE
- SECTION I. SPACE IN GENERAL
- SECTION II. DIMENSIONS
- SECTION III. FORM
- SECTION IV. MOTION
- CLASS III. WORDS RELATING TO MATTER
- SECTION I. MATTER IN GENERAL
- SECTION II. INORGANIC MATTER
- SECTION III. ORGANIC MATTER
- CLASS IV. WORDS RELATING TO THE INTELLECTUAL FACULTIES
- DIVISION (I) FORMATION OF IDEAS
- SECTION I. OPERATIONS OF INTELLECT IN GENERAL
- SECTION II. PRECURSORY CONDITIONS AND OPERATIONS
- SECTION III. MATERIALS FOR REASONING
- SECTION IV. REASONING PROCESSES
- SECTION V. RESULTS OF REASONING
- SECTION VI. EXTENSION OF THOUGHT
- SECTION VII. CREATIVE THOUGHT
- DIVISION (II) COMMUNICATION OF IDEAS
- SECTION I. NATURE OF IDEAS COMMUNICATED
- SECTION II. MODES OF COMMUNICATION
- SECTION III. MEANS OF COMMUNICATING IDEAS
- CLASS V. WORDS RELATING TO THE VOLUNTARY POWERS
- DIVISION (I) INDIVIDUAL VOLITION
- SECTION I. VOLITION IN GENERAL
- SECTION II. PROSPECTIVE VOLITION[1]
- SECTION III. VOLUNTARY ACTION
- SECTION IV. ANTAGONISM
- SECTION V. RESULTS OF VOLUNTARY ACTION
- DIVISION (II) INTERSOCIAL VOLITION[1]
- SECTION I. GENERAL INTERSOCIAL VOLITION
- SECTION II. SPECIAL INTERSOCIAL VOLITION
- SECTION III. CONDITIONAL INTERSOCIAL VOLITION
- SECTION IV. POSSESSIVE RELATIONS
- CLASS VI. WORDS RELATING TO THE SENTIMENT AND MORAL POWERS
- SECTION I. AFFECTIONS IN GENERAL
- SECTION II. PERSONAL AFFECTIONS[1]
- SECTION III. SYMPATHETIC AFFECTIONS
- SECTION IV. MORAL AFFECTIONS
- SECTION V. RELIGIOUS AFFECTIONS