I think it is just the dumbest thing that woman and black people are looked down on, or seen as less than white men by some people. You can't help what you're born into, it's not something that you can choose and yet there are still issues today about whether a woman should get this job or a man should get it. It's important because it shows that they are jut as capable as anyone else, it might encourage others to try for a job that they normally wouldn't have. As soon as someone is brave enough to try something, It'll lead to others trying new things too and then we're all better off.
The word "mighty" gives the impression that the speeches were very powerful and had a big impact, while the word "great" simply means that the speeches were very good.
In the last paragraph, you want to make sure you emphasize your point, as its the last thing the reader is going to remember from it. You may also want to include your own opinion if it is necssary.
