what was the main channel connecting countries in the post how is it different now - Science - Chemical Reactions and Equations

Question

what was the main channel connecting countries in the post? how is
it different now?

Sujeet Kumar · Accepted Answer

Dear student The main channel of connecting countries was foreign
trade that connected the countries in the past One may give example
of trade routes that connected India and South Asia with the rest
of the World Presently, in addition to foreign trade, movement of
services, people, technology and capital are taking place through
out the world that is leading to integration and contributing
towards Globalisation Regards

what was the main channel connecting countries in the post? how is it different now?