Post World War II and even more so post Cold War, humanity hasn't kept up with the levels of inventions between the Renaissance and that time.
Capitalism might be limiting our creativity. It pulls us towards creating ideas which are sellable or marketable. That is what an idea has to be now a days to be considered as good.
This does not necessarily mean that we only focus on money or social recognition. This might be a result of our internal valuation methods of ideas.
What makes a good idea, good?
What gives value to an idea?