... what can Joe Biden do to patch together a frayed nation? The political scientists Robert Putnam...and Shaylyn Romney Garrett provide a wealth of sociologically grounded answers in The Upswing. Although the title is reassuringly buoyant, this is a tale of two long-term trends, one benign, the other a dark descent. An unabashed centrism prevails: political stability, the authors recognise, is a dance that requires a measure of cooperation and disciplined deportment from both parties.