"How and where to start seeding the necessary conditions that will allow Annibale Siconolfi's cities to develop by 2022," is what you seem to me to be asking. And are you expecting to build these on Earth?
The ecologically-positive "look" of most of these city scapes portrayed seems deceiving. While they feature a lot greenery, so did the hanging gardens of Babylon, home to an early despot, Nebuchadnezzar
You would need an authoritarian dictatorship starting well before 1950. There were several then, that had conditions allowed them to continue, would've been well-placed to continue with their grand building programs. But you can go back as far as the Egyptians 4000+/- BC who had their nation-wide system to build the pyramids involving a lot of forced labor and untold riches in the hands of the ruler class.
The Siconolfi cities look like they need more materials to build than most countries can legally acquire. You'd need more wars and more colonial take-overs. Taxes sky-high and poorly-paid labor, as AI and robotics have only barely got started right now. Getting materials from off-planet, say the Moon, wouldn't be economically feasable.
Even if you begin the industrial revolution 500 years earlier, the pollution levels would've brought on climate change with its weather extremes earlier. As it is, in tropical climates where cyclones are common, with the technology of today, buildings are limited to ten floors above ground.