A weapon, arm, or armament is a tool or instrument used in order to inflict damage or harm to living beings - physical or mental -, artificial structures, or systems. In human society, weapons are used to increase the efficacy and efficiency of activities such as hunting, crime, law enforcement, and warfare.

Weapons are employed individually or collectively. A weapon can be either expressly designed as such or be an item re-purposed through use (for example, hitting someone with a hammer). Their form can range from simple implements such as clubs to complicated modern implementations such as intercontinental ballistic missiles and biological weapons. Weapon development has progressed from early wood or stone clubs through revolutions in metalworking (swords, maces, etc.) and gunpowder (guns, cannon), electronics and nuclear technology.

In a broader context, weapons may be construed to include anything used to gain a strategic, material or mental advantage over an adversary on land, sea, air, or even outer space or virtual space.

Matthew Frederick Robert Good (born June 29, 1971) is a Canadian rock musician. He was the lead singer for the Matthew Good Band, one of Canada's most successful alternative rock bands in the 1990s, before dissolving the band in 2002. Other band members included drummer Ian Browne, guitarist/keyboardist Dave Genn, and original bassist Geoff Lloyd, later replaced by Rich Priske. In the years since the Matthew Good Band's disbanding, Good has pursued a solo career and established himself as a political activist and blogger. He is also credited with coining the phrase first world problems.

Good's early career in music involved a variety of folk demos and a stint as the lead singer of a folk band, the Rodchester Kings. Matthew Good and guitarist Simon Woodcock were discovered at an open mic at Simon Fraser University by manager Brent Christensen. Early Rodchester Kings demos were recorded at Fragrant Time Records in Burnaby by Greg Wasmuth and Steven Codling.

The Matthew Good Band was formed in Coquitlam, British Columbia in 1993. In late 1993 they recorded a short demo tape called "Euphony", which featured acoustic songs like "Mercy Misses You", "Heather's Like Sunday", and the title track "Euphony". In 1994, they won a prize in CFOX 99.3's annual local Vancouver independent artist competition "Vancouver Seeds". The prize included recording time at a local studio/recording school, where, in September 1994, they recorded "15 hours on a September Thursday". This demo tape included songs like "Second Sun", "Dancing Invisible", and "Push". In December 1994, the band signed a publishing deal with EMI Publishing.

Michio Kaku (加来 道雄, Kaku Michio^?, born January 24, 1947) is an American theoretical physicist, the Henry Semat Professor of Theoretical Physics in the City College of New York of City University of New York, a co-founder of string field theory, a futurist, and a "communicator" and "popularizer" of science. He has written several books about physics and related topics; he has made frequent appearances on radio, television, and film; and he writes extensive online blogs and articles. He has written two New York Times best sellers, Physics of the Impossible (2008) and Physics of the Future (2011). He has hosted several TV specials for BBC-TV, the Discovery Channel, and the Science Channel.

Kaku was born in San Jose, California to Japanese immigrant parents. His grandfather came to the United States to take part in the clean-up operation after the 1906 San Francisco Earthquake^{[citation needed]}. His father was born in California but was educated in Japan and spoke little English. Both his parents were put in the Tule Lake War Relocation Center, where they met and where his two brothers were born.