You must yield when making a left turn or a U-turn because both situations will mean that you need to make a turn against the correct path of the road, and everyone who is coming the other way has the priority.
When you yield and wait for your turn means that you will make a safe turn.
"That to secure these rights (life, liberty, pursuit of happiness), Governments are instituted among Men, deriving their just powers from the consent of the governed."