* White Americans: King directly addresses the white majority, appealing to their sense of justice and equality. He aims to persuade them to recognize the injustices faced by Black Americans and to join the fight for civil rights.
* The United States government: King highlights the broken promises of equality enshrined in the Constitution and calls upon the government to fulfill its obligations to all citizens.
* The international community: By framing the struggle for civil rights as a universal fight for freedom and justice, King reaches out to people across the globe who were also battling for equality and human rights.
* Future generations: The speech transcends its immediate context and serves as a timeless message of hope and inspiration, urging future generations to continue the fight for equality and justice.
It's important to remember that the concept of "secondary audience" is not always clear-cut. The speech resonates with different groups in different ways, and it's impossible to definitively categorize all of its intended receivers. However, considering the speech's content and King's overall aims, it's clear that he intended to reach far beyond the immediate audience gathered in Washington D.C. on that August day.