I would stop the Immigration Act of 1965:

https://en.m.wikipedia.org/wiki/Immigration_and_Nationality_Act_of_1965

Fuck Ted Kennedy, may he rot in hell.

Scenario 3:

I'm going to Jekyll island with a sniper rifle and explosives.

Nothing was stated about taking modern weapons for the trip but I'd use Scenario 5 and sink every slaver ship that left Africa.

The most effect would be stopping the immigration act of 65 but the buterfly effect makes it likely that my parents don't meet or marry or because of economic reasons have children sooner than later and I'm never born creating a paradox.

So I'm going back to 1999. If all i did was write my younger self instruction and warnings I can't say the timeline would be much improved at this point, it probably would be because I would have frustrated every effort and enriched myself for a long haul struggle to build the equivalent of the isolated clifftop communities that survived the bronze age collapse.

Essentially with financial history at play, especially if I had forewarning and could record a few lotto numbers and make clear the objectives my younger self could have skipped a number of grades gotten emancipated and founded a few simple web companies just a year before they were actually founded like twitter, they should be paying dividends by the time bitcoin hits the scene and I'd mine like crazy off my tech company profits. If I nurture bitcoin appropriately I'd have probably become the richest man on earth in about 2020 and could spend roughly 3 billion dollars a year building company towns where I secure the best of the white race to survive the collapse of our civilization or more likely produce a high rate of reproduction by building a healthy society and economy and we just make butt-loads more towns to the point our enclaves eventually out reproduce all the american cities and re-moralize the country. I can strictly control who moves into my company towns so long as I own it all but unfortunately I'll have to have exclave business that employ nogs and such to avoid getting drone striked. As to other tactics I would likely try to get the local crips on side by convincing them I work for someone with insider knowledge who wants to use their organization for mutual benefit I'd try to get cripps to knock off important figures responsible for creating future problems with the promise of giving them the inside numbers on investments so they can improve the efficiency of their operations, I wont name who I'd try to take down but I will say preventing covid, gay marriage, the woke cult, islamic migration and depriving the enemy of their best most even hands, controlled opposition and propagandists would be my objectives before those figures ever become household names. For a revolt against the modern world our enemy has created to come about they still have to create an objectionable world so I can't go preventing and mitigating all their evils just the most costly and intractable ones. The other function of this long game would be priming slogans for future movements I need to solve problems, essentially planting memetic seeds to sprout at later dates, this means vandalizing a bunch of public toilet stalls in 1999.

My big question is whether or not to try and prevent or mitigate the 08 financial collapse, instinct says to mitigate it and reap profits of under priced housing from negro sub prime mortgages but its going to be tricky trying to reduce harm only to whites and yet again nobody revolts against their own prosperity.

Most definite positive impact: Scenario 7, prevent the slaveships from docking in North America. Most impact overall, but less definite: Scenario 3, prevent the formation of the Federal Reserve. And if I can help it, prevent the passage of the Nineteenth Amendment, but considering overall trends in the West it would be very, very difficult to do.

Scenario 2.5 Hitler Wins

Scenario 7:

Exterminate abraham and his offspring.