Earlier quoted context omitted.
What's your opinion about the causes of this "mini Dark Age"? Do you still feel that we're in it?
Around the early 1970s, the great watch-word of the culture became "back." This came primarily in two forms: back to nature (left), and back to the Bible (right). Under the hood both embrace the naturalistic fallacy (natural equals good) and the idea that there is a proper order from which we have deviated (sin, redemption, reconciliation). This manifested as the Religious Right, the anti-development wing of the Gree…
Capitalism drove very little of the invention in earlier times, it was largely driven by World War I and II. WWII saw a large chunk of Europe and America's top minds bind together to stop the Axis, and then after the war their work could be integrated too. This led to a tremendous amount of knowledge that led to computers and the space projects among so much more. By the 70's the main gains were already fleshed out,and the system was back to private competition.
If it's a change of philosophy and behavior, it's a change towards peace, removing the absolute need to invent new things and the unquestioned resources to be able to do so.