You can't be a first-world economy in the 21st century if you haven't laid the groundwork to seize the opportunities.

You can't be a first-world economy in the 21st century if you're not on the path to a clean energy future.

The 21st century simply means open century.

The great challenge of the twenty-first century is to raise people everywhere to a decent standard of living while preserving as much of the rest of life as possible.

It's important to move the theatre into the 21st Century.

Twitter is the samizdat of the 21st Century.