Trade brought people together with the exchange of goods, raw materials, and ideas. this was possible due to:

Trade did not happen in human history until crop surpluses were generated and, in turn, these were possible due to the technological improvements that were implemented in agriculture. Ancient civilizations had not been able to trade with each other, because they were only able to produce food for self-subsistence.

On the contrary, when new technology was implemented and productivity increased, so did the total outpu. The extra food that was not consumed started to be traded with neighbour communities. Each community started to specialize on cultivating a certain product, to sell the production surpluses, and to use the money earned to buy the goods that they did not produce by themselves.

randy pausch was a famous mathematician, writer and lecturer who is particularly famous for his last speech, given in 2007, "the las lecture", because he illustrates why one's dreams need to be pursued in a logical order if success is to be obtained, option c. at this time, pausch had been diagnosed with terminal cancer so he told the audience to follow their childhood dreams, which were possible to achieve. it has been recognized as one of the best motivational speech around the world.