# The Principle of Moments

Professional ratings :
| Review scores ||
| Source | Rating |
| AllMusic | |
| Rolling Stone | |
The Principle of Moments is the second solo studio album by the English singer Robert Plant, formerly of Led Zeppelin. It was Plant's second Top 10 album in the US and UK. It also gave him his first solo Top 40 hit with "Big Log". The most popular track on album-oriented rock radio in the US was "Other Arms", which reached number-one on the Billboard Top Tracks chart. Genesis' drummer Phil Collins played drums on five of the album's eight songs (as he did on Pictures at Eleven). On two tracks former Jethro Tull drummer Barriemore Barlow performed and on the closing track, "Big Log", Gerald Woodroffe programmed a Roland TR-808 drum machine.
Like Plant's debut solo studio album, Pictures at Eleven (1982), the songs departed from the hard rock sound of Led Zeppelin. Following the strength of these albums, Plant launched a successful tour in 1983. Phil Collins was the drummer for Plant's band for the North American portion of the tour. Collins was content to perform in the background, despite his own enormous success as a solo artist and with Genesis at the time. Little Feat's Richie Hayward played drums for the remaining dates.
Rhino Entertainment released a remastered edition of the album, with bonus tracks, on 3 April 2007.

## Promotional music videos

The music video for "Big Log" was shot at the following locations: Crystal Road, Crystal, Nevada (gas station sequences), the Amargosa Opera House, Death Valley Junction, California (driving and "feather" sequence), Calico School House (Calico Ghost Town) Yermo, California (schoolhouse sequence), Glass Pool Inn, Las Vegas, Nevada (pool sequence). The bar sequence is believed to have been shot at a small bar in Shoshone, California (now the Crow Bar Cafe & Saloon), though this is unconfirmed.
A video for "In the Mood" was also produced.

## Tour

In 1983, Robert Plant went on a tour to promote the album, starting on 26 August in Peoria, Illinois, and ending on 1 October in Vancouver, British Columbia.
Tour dates :
* 26 August 1983: Peoria, Illinois – Peoria Civic Center
* 27 August 1983: Kalamazoo, Michigan – Wings Stadium
* 29 August 1983: Rosemont, Illinois – Rosemont Horizon
* 30 August 1983: St. Louis, Missouri – Kiel Auditorium
* 31 August 1983: Milwaukee – MECCA Arena
* 3 September 1983: Detroit – Joe Louis Arena
* 4 September 1983: Cleveland, Ohio (Richfield) – Richfield Coliseum
* 6 September 1983: Worcester, Massachusetts – The Centrum
* 8 September 1983: Montreal – Montreal Forum
* 9 September 1983: Buffalo, New York – Buffalo Memorial Auditorium
* 10 September 1983: Toronto – Maple Leaf Gardens
* 12 September 1983: New York City – Madison Square Garden
* 13 September 1983: Hartford, Connecticut – Hartford Civic Center
* 14 September 1983: Philadelphia – The Spectrum
* 16 September 1983: Memphis, Tennessee – Mid-South Coliseum
* 18 September 1983: Biloxi, Mississippi – Mississippi Coast Coliseum
* 20 September 1983: Houston, Texas – The Summit
* 21 September 1983: Austin, Texas – Frank Erwin Center
* 22 September 1983: Dallas – Reunion Arena
* 24 September 1983: Denver, Colorado – McNichols Arena
* 27 September 1983: Los Angeles (Inglewood) – The Forum
* 28 September 1983: Oakland, California – Oakland–Alameda County Coliseum
* 30 September 1983: Seattle – Seattle Center Coliseum
* 1 October 1983: Vancouver, BC – Pacific Coliseum |||

## Track listing

* Live tracks: recorded at The Summit in Houston, Texas on 20 September 1983.

## Personnel

* Robert Plant – vocals
* Jezz Woodroffe – keyboards, synthesizers, Roland TR-808 (8)
* Robbie Blunt – guitars
* Bob Mayo – guitars (9–11)
* Paul Martinez – bass guitar
* Phil Collins – drums (1–3, 5, 6, 8, all bonus tracks)
* Barriemore Barlow – drums (4, 7)
* John David – backing vocals
* Ray Martinez – backing vocals

### Production

* Robert Plant – producer, mixing
* Benji Lefevre – producer, mixing
* Pat Moran – producer, mixing, engineer
* Storm Thorgerson – sleeve design
* APP – sleeve design
Remastering credits
* Dan Hersch – remastering (1–8)
* Bill Inglot – remastering (1–8)
* Raj Das – remastering and renovating (9–12)
* Nicola Powell – supervision
* Bill Curbishley – management
* Ed Vulliamy – liner notes
* DigiPrep (Hollywood, California, USA) and RAK Studios (London, UK) – remastering locations

## Certifications

Certifications for The Principle of Moments :
| Region | Certification | Certified units/sales |
| Australia (ARIA) | Gold | 35,000$^^$ |
| Canada (Music Canada) | Gold | 50,000$^^$ |
| New Zealand (RMNZ) | Platinum | 15,000$^^$ |
| United Kingdom (BPI) | Gold | 100,000$^^$ |
| United States (RIAA) | Platinum | 1,000,000$^^$ |
| $^^$ Shipments figures based on certification alone. |||