The World is More Peaceful Now Than at any Time in simce 1950

Source: "OK, Haters, It's Time To Admit It: The World Is Becoming A Better Place"

The trend seems clear. The number of war and battle deaths is decreasing over time, no mater what region you look at -- given a long enough period of observation. The major periods of decreasing violence are: post World War 2. post Vietnam War, and after the dismemberment of the USSR

A brief timeline of war from the late 1970s to 1999 follows:

• In the late 1970s and 1980s there were the Afghanistan War and the Iraqi-Iranian War; the latter war ends in 1980; Great Britain and Argentina have a limited war over the Falkland Islands
• There are massive demonstrations calling for less Communist ideological regime in the Warsaw Pact nations in the early 1980s as well as demonstrations calling for reforms of the Chinese government.  Israel invades Lebanon.
• In 1985 Gorbachev succeeds to power in Russia, 
• In 1986 the Chernobyl disaster takes place, leaving a large footprint of radioactive gas west of the site in the Ukraine.
• 1987: the Iran Contra scandal become public.
• 1988: George H.W. Bush become U.S. president. Benazir Bhutto is chosen to lead Pakistan. 
• 1989: The Berlin Wall comes down. The beginning of the end of Communist government in Poland, Hungary, Czechoslovakia and Romania can be perceived (perhaps in retrospect, better than at the time). Huge pro democracy demonstrations are held in Tiananmen Square in China. The Soviet Union withdraws its troops from Afghanistan.
• 1990: Iraq invades Kuwait igniting the Persian Gulf War. East and West Germany are reunited. The Cold War is officially ended as the U.S. and USSR negotiate arms accords. Nelson Mandela is freed. leading to a public process to normalize governance in South Africa. Leaders of 34 European nations proclaim a united Europe.
• 1991: The U.S. led alliance wins the Persian Gulf War. Communist hard-liners attempt to overthrow Gorbachev, but the coup fails. Gorbachev resigns as President. The USSR dissolves into 15 separate republics. The Warsaw Pact for military protection is dissolved. Boris Yeltsin is elected as the president of the Russian Republic. South African parliament overturns apartheid laws.
• 1992: Presidents Bush and Yeltsin declare a formal end to the Cold War.
• 1993: Clinton becomes U.S. President. The European Union is ratified. American soldiers die in Mogadishu, Somalia. Rwandan genocide begins. A Western multinational effort begins seeking to stop ethnic cleansing in the former Yugoslavia. President Boris Yeltsin's forces crush a revolt in the Russian Parliament. South Africa adopts a majority rule constitution.
• 1994: Ethnic cleansing continues in the former Yugoslavia. In Rwanda, Hutu militias kill up to a million Tutsis. South Africa holds its first interracial, one-man-one-vote election and Nelson Mandela is elected president. Russia attacks the republic of Chechnya after Muslims there attempt to secede.
• 1995: Fighting escalates in Bosnia and Croatia. At the end of the year, combatants sign the Bosnian peace treaty.
• 1996: Taliban Muslim fundamentalists capture Kabul, the capital of Afghanistan. Later al-Qaeda terrorist training camps are set up. Iraqi troops fire on Kurdish positions in the north of the country. The U.S. warns Iraq, attacks Iraq's air defenses and declares a "No Fly" zone in the north of the country. Refugees in Rwanda and Burundi are caught up in new fighting and killings.
• 1997: 
• 1998: In Northern Ireland, the Good Friday Accords promise peace and political power sharing. Violence in the former Yugoslavia continues until NATO reaches a settlement with President Milosevic in October.
• 1999: NATO air strikes move to Kosovo. In May, Serbs agree to pull troops out of Kosovo. Israeli prime minister Ehub Barak and PLO leader Yasir Arafat announce peace accord. 
• 2000: Palestinian and Israeli violence explodes into the "intifada."
• 2001: On September 11, terrorists attack the World Trade Center in New York.
• 2002: Israeli tanks and warplanes attack West Bank towns in retaliation for 14 suicide bombing incidents. 
• 2003: In March, the U.S. and Britain launch war against Iraq. Within a month, Baghdad falls. By July, the war is costing $3.9 billion a month. Saddam Hussein's sons are killed in a firefight, but their father remains at large. In December, Saddam Hussein himself is captured by American troops. Israel retaliates for suicide bombings by killing top members of Hamas. Other militant Palestinian groups formally withdraw from a cease fire. Bush's "road map" to peace collapses.
• 2004: Iraq weapons investigator David Kay resigns saying there is no evidence that Iraq ever had weapons of mass destruction. U.S. media release graphic photos of American soldiers abusing and sexually humiliating Iraqi prisoners at the Abu Ghraib prison. Protests erupt all over the world. In June, the U.S. hands over power to an Iraqi interim government led by Iyad Allawi. In November, U.S. troops launch attacks on Falluja. Spain is rocked by terrorist attacks, and al-Qaeda claims responsibility. NATO formally admits seven new countries from the former Soviet block. Sudanese rebels and the government reach accord to end the 21-year-old civil war. But in a separate war in western Darfur region, the killing continues. Pakistani nuclear scientist A. Q. Khan admits he sold nuclear weapons designs to other countries, including North Korea, Iran and Libya. UN weapons inspectors tell Iran to stop enriching uranium. Iran claims they are building only peaceful uses for nuclear power.
• 2005: In Iraq, elections are held to select a national assembly; Iraqi voters turn out again in October to ratify a new constitution. In December, 11 million – 70 percent of those registered – vote to elect their first permanent Parliament. The European Union abandons plans to ratify the proposed European constitution by 2006 after both France and the Netherlands vote against it. London is hit by Islamic terrorist bombings, killing 52 people and wounding 700. The Irish Republican Army announces it is officially ending its violent campaign for a unified Ireland and will instead pursue its goals through the political process.
• 2006: In January, President Bush announces he will send a "surge" of 20,000 more troops to Iraq in addition to the 130,000 already there. In Iraq, violence between different sects increases. In November, voters elect Democratic Party majorities in both the House and the Senate, largely due to opposition to the war in Iraq. Defense Donald Rumsfeld steps down and is replaced by Robert Gates. Iran removes United Nations' seals from its uranium enrichment plant and production of the fuel is resumed. 
• 2007: The top commander in Iraq, Gen. David Patraeus, says the troop "surge" is working, reducing sectarian killings in Baghdad and across the nation. At a hearing at Guantánamo Bay, Cuba, Khalid Shaikh Mohammed confesses to planning the September 11 Al Qaeda attachs on the World Trade Center. He also claims responsibility for a number of other terrorist acts.

This timeline is summarized from a more detailed one.