So, in one of the lines of the preamble it states "establish justice and domestic tranquility". In today's society, we attempt to establish justice as much as we can. When it comes to freedoms, our community tries to do everything they can so everyone could get along. For example, in the earlier years, African Americans didn't have the same rights as white people did. Today, any kind of race or skin color, has the same rights as anyone else can. Everyone can go where they want to go and do what they want to do (as long as it doesn't go against the law), and we have many freedoms.
This answer does support the statement about establishing justice. Today an unfair things that is a major part, doesn't slip through easily. Once they find out that it isn't fair or right, it is gone. This is also challenging because sometimes justice can take weeks to be established. There are many difficult things that come in life that take a long time to solve.
In The Giver, everything is equal and everything is peaceful. This does follow the statement in the preamble about justice and tranquility. Everything is equal so there is no fights or protests. Everything is equal and the same so nothing is ever upside down or is wrong in that world