I think a small minority of humanity is ready to build the TDG.
One thing the book makes clear is that not all of us are at the same yuga stage. For example, the book consideres Tesla and Einstein as Treta Yuga thinkers in the down of Dwapara Yuga. There will be Kali Yuga people in the Satya times.
Much of the TDG came to me in a blinding flash of insight. Within about two minutes I realized the western democracy (including the Canadian version) was structurally corrupt and was not going to reform itself AND then I got the concept of tiered, indirect elections in a non-partisan manner. All this within about two minutes. Of course, putting this concept on paper took a lot longer--and over the years, it has been refined.
While getting to Treta Yuga is still a long process, would it not be possible to accelerate this process? Building the TDG could help. I still say we need only about 20 years to build the TDG.