Physicist Richard Feynman once said that if all knowledge about physics was about to expire the one sentence he would tell the future is that "Everything is made of atoms". What one sentence would you tell the future about your own area, whether it's entrepreneurship, hedge funds, venture capital, or something else? Examples: An economist might say that "People respond to incentives". I had an engineering professor years ago who said all of that field could be reduced to "F=MA and you can't push on a rope".
There's lots of good and diverse responses out there...
People power culture with the tools they have at hand. The future is built by the curious -- the people who take things apart and figure out how they work, figure out better ways of using a system, and explore how to make new things fit together in unexpected ways. The only freedom that can never be taken away from us (and hence our only area of true control) is our response to a situation. The Secret to Existance is Movement. Whatever else you do, don't skimp on backups or fire extinguishers.
This actually relates to a project I've been thinking about a bit, which maybe I'll say more about later. Anyways, here's my summary of the Universe in a sentence. The Universe began, about 13.7 billion years ago, as a hot, dense soup of elementary particles, and has been expanding, cooling, and clumping ever since. Readers, what's your sentence? (Not limited to physics, of course!)