Leibniz was able to integrate in 1675.
With the hedgehog the pricks can be seen on the outside and with a Jeep the prick can be seen on the inside.
A major difference.
Technologically backward" What do you call a county that lacks a fully integrated banking system? "Economically underdeveloped." What do you call a country that lacks a well-connected public transportation system? "America"
You integrate it