This is a pretty easy one, really. Should be spread to normies who need some educating. And each answer should have a link to something supporting the answer. Might be effective for some.

Food /water

Corrupting the church and convincing people to not go to church to worship and grow together, which also made tight knit communities.

Corrupting the minds of children in school to make women want a career over kids and believe that they don't need men.

Convincing boys to be soft, weak pussies which makes them undesirable to men.

Adding a boat load of shit to food which makes people fat, stupid and lazy, while increasing issues of infertility.

Convincing normal girls to become whores and rack up their body counts or have nudes of them on the internet to the point that men don't want them.

Fucking with the economy so that young people now think "why should I get a license if I can't afford a car". That carries over and becomes "why should I get married if I can never afford a house so can't raise kids".

Using the jew owned media to demonize white people while using their jew owned court system to let savage niggers commit crime with no consequences.

All of that contributed, but the piece that tied all the corruption efforts together and allowed them to grow was the destruction of the traditional family unit as a didactic authority structure teaching and enforcing morals and values. The success the Frankfort School of kike Marxists had in replacing didactic teaching material in schools with dialectics and eternal dialogue and compromise is the root of the downfall of the West.

All of the above

All.. Probably missing a few actually. They work from a multitude of angles.