あらすじ

3
The Brief
15
The View
22
Winter Offensive
To prevent Putin from going nuclear, Ukraine must continue the fight
By Elliot Ackerman
Plus: Biden’s strategy
By Graham Allison
28
Nuclear
Moment
Beatrice Fihn, who won a Nobel for campaigning for global disarmament, meets a perilous turning point
By Naina Bajekal
32
Building a Better Bomber
The stealthy and
very expensive
B-21 Raider heralds a new era of great-power confrontation
By W.J. Hennigan
38
Farming
In the Forest
Agroforestry offers both a lifeline for Brazil’s troubled agriculture industry and an alternative to clear-cutting the Amazon
By Ciara Nugent
44
A Happiness Guide
The founders’ pursuit
By Darrin M. McMahon
How the happiness professor battles burnout By Jamie Ducharme
Plus: Joy-building tips from
experts
57
Time Off
Workers take a water break while planting tree seedlings in Timburi, Brazil
Photograph by Victor Moriyama for TIME