The conversation between human and AI assistant.
Is there any advantage in driving on the left versus on the right?
Why do some countries drive on the left while others drive on the right?
The reason for this has to do with history. In the past, people would travel on horseback, and since most people are right-handed, they would keep to the left side of the road so that they could use their right hand to defend themselves against approaching enemies or passers-by. This practice continued when people started driving carriages, and eventually became law in many countries.