The most influential invention of maybe all time is the chariot was introduced to early Egypt near the beginning in the Second Millennium B.C. The Romans used the Chariot for war and for moving goods great distances. Even today we're affected by its invention. The car is a later version of the chariot. Through the centuries that is what it’s developed into.
This is one of the most monumental inventions because it gave us such a good basis for later technological advances. It’s opened up trade, increase success in battle, and allowed the people of that time to travel easier.