Peace
Peace was the absence of war.
The Master, while posing as the Commissioner of Sirius IV, told the Draconian Emperor that law and order could only exist in times of peace. (TV: Frontier in Space)
The Kamille in peace lived on Mekalion for a thousand years before they were threatened with extinction. (AUDIO: The Kamelion Empire)
Jelly babies were originally named Peace Babies, and were first sold in 1918 to celebrate the end of World War I. (PROSE: Wolsfsbane)
In 1938, after British Prime Minister Neville Chamberlain sought to defuse the Czechoslovakia crisis, (PROSE: Illegal Alien) he declared there would be "peace in our time", but he would be proved wrong. (PROSE: One Wednesday Afternoon) His opponent, Adolf Hitler claimed to be a man of peace before Germany invaded Poland in 1939, as part of a propaganda campaign to paint Warsaw as the true aggressor. (PROSE: Timewyrm: Exodus)
In the Buddhist religion, peace was represented by the swastika. Although the swastika was appropriated by the Nazis during World War II, Buddhists continued to use it as a peaceful symbol after the war. (PROSE: Utopia)
The Abzorbaloff claimed that to be absorbed was "everlasting peace". (TV: Love & Monsters)
The Eleventh Doctor echoed Neville Chamberlain, claiming "peace in our time" when he and the Tenth Doctor organised a human/Zygon peace conference. (TV: The Day of the Doctor) The negotiated peace proved fragile. (TV: The Zygon Invasion/The Zygon Inversion)
Hecuba challenged the Second Doctor to a game in which players had to imagine ways of defeating their opponents' increasingly destructive weapons. The Doctor brought the game to an end by declaring peace, much to Hecuba's disappointment. (AUDIO: The Queen of Time)
At the onset of the Siege of Trenzalore, the Eleventh Doctor insisted to Tasha Lem that, should the Time Lords be allowed to return to N-Space, they would come in peace. Given the universe's fear of the Time Lords, Tasha insisted that this would not matter and that Time Lords' return would cause the other races to resume the Last Great Time War. When the Siege turned into a full war, Tasha claimed to the Doctor that her actions over the past three centuries had been in service of peace. (TV: The Time of the Doctor)
Davros believed that if the Daleks were the only lifeform in the universe, peace would reign. (TV: Genesis of the Daleks) The Daleks inherited this belief, using it as justification and rationalisation for their crusade against the Thals. (AUDIO: The Lights of Skaro, Return to Skaro)