Augustine defended a position where very few people could be justified,
Jesuits defended a more lax position, which held there is a way to be free from original sin,

Augustine was very much against Manicheism,

this created again a kind of pessimistic worldview but what is interesting is that kind of worldview was quite influential, especially among common people that opposed themselves to nobility and rich, affluent people. Like you have seen before, part of the reformation wasn’t just a theological reaction but also to the hypocrisy of the upper-class people. Jansenism is also a critique of rich people. Jansenism started in Leuven, Jansen was a primus inter pares. In Paris he develops his ideas about Augustine.

Jansen was ordained the bishop of Ypres, and died a few years later. Blaise Pascal was one of the people defending Jansenism against the Jesuits. He wrote pamphlets, and tried how good they were by reading them to a 40 year-old woman and 16 year-old boy, fixing stuff when they lost attention.

could he speak the fuck up

Jansenism believed you have to be pious, religious and truthful.