1721 (MDCCXXI) ebile ngwaga wa go thoma ka Laboraro, ngwaga wa bobedi ngwagengsome wa 1720s, ngwaga wa bomasomepedi tee ngwagengkgolo wa Ngwagakgolo 18, le ngwaga wa bomakgolo šupa masomepedi tee ngwagengkete wa Ngwagakete 2.