Explain this quote in relation to Holbach and Stuart Mill.

Skinner says: ” The belief in determinism is necessary for the study of behavioral sciences”. Explain this quote in relation to Holbach and Stuart Mill.

format: 4-6pager, Arial font 12 double spaced.

Course: Introduction to philosophy/logic

Sources should be from both philosophers works:
Baron d’Holbach: Humans are determined
John Stuart Mill: A system of Logic