There is an old promise, perhaps the boldest promise a people have ever made. It states, “We hold these truths to be self-evident: that all are created equal.” On different corners of this campus today there are many convocations, the law school, the government school, the business school -- each of these noble callings have taken their turn in working to fulfill this most ambitious promise. The law school brought us brown v board, the Kennedy school brought us the civil rights legislation and school choice. The business school brought technological breakthroughs that have empowered the middle class to make it possible for more kids to have access to more ideas, and those have all been indispensable advances that brought us to where we stand today.
Does 'these noble callings' here mean the law school, the government school, the business school? But I don't understand why the speaker expressed it as 'noble callings'. Does that mean what all those shools have done(achieved) are noble and great?
And one more, does that 'empowered' means 'financial support' here?