Madam Walker's legacy lives in her philanthropy as well as in an amazing line of hair care products.
Why are we, as a nation so obsessed with foreign things? Is it a legacy of our colonial years? We want foreign television sets. We want foreign shirts. We want foreign technology. Why this obsession with everything imported?
If you think about the market that we're in, and more broadly just the enterprise software market, the kind of transition that's happening right now from legacy systems to the cloud is literally, by definition, a once-in-a-lifetime opportunity.
What if there was a library which held every book? Not every book on sale, or every important book, or even every book in English, but simply every book - a key part of our planet's cultural legacy.
We must erase bin Laden's ugly legacy, not extend it: by ending the Patriot Act's erosion of our civil liberties, we can protect the freedoms that make America worth fighting for.
As well as our relationship with Afghanistan, I am researching the legacy of other European empires - in Africa. We think of those empires as history, but actually, they still haunt our everyday lives in the strangest of ways.