Five Best Ideas of the Day: November 18

1. The worst ceasefire: Russia and Ukraine are both preparing for war as their uneasy peace slips away.

By Jamie Dettmer in the Daily Beast

2. With the rise of legal cannabis, the small-holders running the industry may soon be run off by the “Marlboro of Marijuana”

By Schumpeter in the Economist

3. From taking India to Mars on the cheap to pulling potable water from thin air: Meet the top global innovators of 2014.

By the writers and editors of Foreign Policy

4. Some charter schools promote aggressive policies of strict discipline, and that strategy may be backfiring.

By Sarah Carr in the Hechinger Report

5. As local police forces become intelligence agencies, we need sensible policies to balance privacy and public safety.

By Jim Newton in the Los Angeles Times

The Aspen Institute is an educational and policy studies organization based in Washington, D.C.