David Callahan

We take a look at dirt-covered surgeons, billionaire philanthropists, and the effects of time-saving spending habits. That’s all this week on Innovation Hub. Read More...

Is it a completely good thing when a billionaire gives away their money? David Callahan walks us through the new world of philanthropy.

Why does so much of our most popular science-fiction feature bleak, depressing futures? We talk to a science-fiction writer to find out.

Our tax system is inefficient, unfair, and infuriating. TR Reid tells us how to fix it.

Big philanthropists like Bill Gates and the Koch Brothers are reshaping our society. But, we don’t really have much of a say as to how. We look at the rise of big philanthropy. Read More...