Final answer:
The members of the National Convention pursued a policy of de-Christianization in order to establish a new, secular order and weaken the influence of the Catholic Church. This policy also aimed to promote reason and scientific thinking over religious dogma.
Step-by-step explanation:
The members of the National Convention pursued a policy of de-Christianization in order to establish a new, secular order and break ties with the old religious hierarchy. This policy aimed to weaken the influence of the Catholic Church, which was seen as supporting the monarchy. Additionally, the de-Christianization policy sought to promote reason and scientific thinking over religious dogma.