¿Esto suena natural? The United Nations (UN) was founded after the end of the World War II, which is the most destructive war in human history. In 1948, the Universal Declaration of Human Rights was proclaimed by the United Nations General Assembly and it establishes the fundamental rights to which every human being is entitled. It's been translated into many languages and dialects since it was first written and many consider it one of the most important documents in history. Moreover, many national constitutions in the twentieth century were inspired by the Declaration, including the Brazilian Constitution.

There are a few errors, but this is great!

The United Nations (UN) was founded after the end of World War II, the most destructive war in human history. In 1948, the Universal Declaration of Human Rights was proclaimed by the United Nations General Assembly and it established the fundamental rights to which every human being is entitled. It's been translated into many languages and dialects since it was first written and many consider it to be one of the most important documents in history. Moreover, many national constitutions in the twentieth century were inspired by the Declaration, including the Brazilian Constitution.