Final answer:
Martin Luther King Jr. alludes to the enduring horrors of enslavement and bondage experienced by African Americans in his 'I Have a Dream' speech, highlighting how the promises of freedom and equality have remained unfulfilled even a century after the Emancipation Proclamation.
Step-by-step explanation:
In his “I Have A Dream” speech, Martin Luther King Jr. makes an allusion to the horrors of enslavement and bondage experienced by African Americans. The reference to "one hundred years later" is an indication of the time passed since the Emancipation Proclamation, designed by Abraham Lincoln to free the enslaved. King draws a parallel between the historical plight of African Americans during slavery and the continued struggles against segregation and discrimination long after the formal abolition of slavery. His speech underscores the deep disappointment felt by the African-American community due to the failure to attain the fully promised freedom and equality.
Dr. King also appeals to the collective conscience by illustrating the stark contrast between African Americans living in poverty amidst a wealthy society. This juxtaposition intensifies the sense of injustice and underlines the idea that the Negro at the time of the speech felt an exile in his own land.
Finally, by bringing these issues to the forefront in the shadow of the Lincoln Memorial on the anniversary of the Emancipation Proclamation, King was not only alluding to the past but also challenging America to live up to its promise of freedom and equality. This challenge serves to highlight the continued relevance of the nation's core values and the need for action to achieve the American dream of equal opportunity.