Final answer:
Alison Jaggar contends that the exclusive focus on arguments in philosophy neglects historical and cultural contexts, leading to a limited understanding of the development of philosophy.
Step-by-step explanation:
Alison Jaggar's main contention is that the exclusive focus on arguments in philosophy neglects various contexts in which past philosophers lived and worked, leading to a limited and ahistorical understanding of the development of philosophy. This approach judges past philosophers by contemporary standards, ignores historical and cultural contexts, and attributes contemporary ideas to historical philosophers inaccurately.