Short answers, pulled from the story.
Wayne Smith released the single Under Mi Sleng Teng in 1985, which became the first reggae track built entirely on a digital rhythm generated by a Casio Casiotone MT-40 keyboard. This song created a blueprint for a new era and spawned over two hundred subsequent recordings that year alone.
Michael Tomlinson and Lois Grant officially joined the words Dance and Hall to create the single term Dancehall in 1982. They staged a series of concerts at the Harbour View Drive-In starting that year to establish the venue and music as one concept.
The 1981 album A Whole New Generation of DJs produced by Junjo Lawes marked the shift where deejay records became more important than records featuring singers. This release signaled the emergence of new stars like Captain Sinbad, Ranking Joe, and Clint Eastwood.
The single Get Busy from the 2002 album Dutty Rock by Sean Paul became the first dancehall track to reach number one on the US Billboard Hot 100. This achievement marked the evolution of dancehall from a local phenomenon into a global force by the early 2000s.
The Stop Murder Music movement initiated by groups like OutRage! and J-Flag targeted homophobia in dancehall music following the 1992 release of Boom Bye Bye by Buju Banton. This campaign led to some artists signing the Reggae Compassionate Act and agreeing to not use anti-gay lyrics.