A Egghead tutorial teaches it like this:

var React = require('react');

var Router = require('react-router');

var routes = require('./config/routes');



Router.run(routes, function(Root){

  React.render(<Root />, document.getElementById('app'));

});

Yet I get this error:

Uncaught TypeError: Router.run is not a function

note:
I've already updated react-router to the recent version.