What was the main channel connecting countries in the past? How is it different now?

Trade was the main channel connecting the countries in the past. For example Silk route connected different countries of the world; as a result huge trade took place through this route. Trade in the past was restricted to finished goods being produced in one market and sold in other markets. In today’s time beside trade; capital, technology, people and services-flow is also taking place all over the world. Today the world is connected in a way where production also takes place across different countries