That’s an easy question: Tulsa, OK aka; Black Wall Street was so successful because they practiced Group and Communal Economics. They pooled their resources, they recycled not only their currency but their skills and resources among each other, and finally, they did not dilute their time, resources, and talents among the White majority. That’s it.
Of course, it was much easier to practice Group and Communal Economics because Integrating and diluting ourselves into the dominate or White economy (on a mass scale) wasn’t an option until the mid-60s.
That’s the foundation of all of the successful Black communities or towns from the Black Metropolis of Bronzville in Chicago, Strivers Row of Harlem, Rosewood in Florida, Allensworth in California, Tulsa OK, and many more Black towns and prosperous communities that sprung up between Reconstruction and the mid-60s.
Dr. Claud Anderson pretty much has modernized this formula for success in his magnificent text; Powernomics: The National Plan to Empower Black America. There’s also The Blueprint for Black Power by Dr. Amos N. Wilson that also lays out in greater detail these same tried and proven strategies for collective successful.
Since you didn’t ask me about why they failed, or why we will/or have failed to repeat that success I won’t burden you with a drawn out explanation about it, but I would be remiss if I didn’t touch on that.
The reason Tulsa was destroyed, and all the rest. Some were destroyed by open violence and aggression, others through more subtle means like policy manipulation and redlining. Sadly, that will be the fate if we do the same.
White (local, state, and federal) government agencies and non-state White actors and institutions have stolen more than a Trillion dollars worth of land, wealth, and resources from Blacks in the US since the Emancipation of Black people and the ratification of the 13th, 14th, and 15th Amendments to the Constitution! It’s so much bigger than Reparations for Slavery. There isn’t enough loot in the US treasury to make good on it’s debts to Blacks, and the US is still adding on to that debt to this very day.
That’s why Group and Communal Economics are not adequate for an Oppressed Population, it only works after you are liberated, or you have fought your oppressors to a stalemate; just ask China, or the Chinese-American community.
We need Revolutionary Economics which expands and intensifies Group and Communal Economics; that’s the only way to build in such a way that will not be vulnerable to White Aggression and Subversion.
As the Racist used to say “a rich Ni99er is still a Ni99er,” I imagine they still say that, just not in mixed company.
We can’t buy our way out of oppression. Securing wealth without securing liberation only makes you a more enticing and vulnerable target to your oppressors; or worse, it will force you to see the interest of your oppressors as you own.