In British English it is no longer considered a solecism to use the plurals they, their, them, theirs as a generalized pronoun for words like eyeryone, everybody, anyone, anybody , etc.
( ( ( ( ( ( ( In ( British English ) ) ( it ( ( is ( no longer ) ) ( considered ( a ( solecism ( to ( use ( ( the plurals ) they ) ) ) ) ) ) ) ) ) , ) ( ( their , ) them ) ) , ) ( theirs ( as ( ( a ( generalized pronoun ) ) ( for ( words ( like ( eyeryone ( , ( everybody ( , ( anyone ( , ( ( anybody , ) etc. ) ) ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (PP (IN In) (NP (NNP British) (NNP English))) (NP (PRP it)) (VP (VBZ is) (ADVP (RB no) (RB longer)) (VP (VBN considered) (NP (DT a) (NN solecism) (S (VP (TO to) (VP (VB use) (S (NP (DT the) (NNS plurals)) (NP (PRP they)))))))))) (, ,) (S (NP (PRP$ their)) (, ,) (NP (PRP them))) (, ,) (S (NP (PRP theirs)) (PP (IN as) (NP (NP (DT a) (JJ generalized) (NN pronoun)) (PP (IN for) (NP (NP (NNS words)) (PP (IN like) (NP (NN eyeryone) (, ,) (NN everybody) (, ,) (NN anyone) (, ,) (NN anybody) (, ,) (FW etc.)))))))) (. .)))
I think this goes a long was to simplify language and make it more accessible to people.
( I ( ( think ( this ( goes ( ( a long ) ( was ( to ( ( ( simplify language ) and ) ( make ( it ( more ( accessible ( to people ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP think) (SBAR (S (NP (DT this)) (VP (VBZ goes) (SBAR (S (NP (DT a) (JJ long)) (VP (VBD was) (S (VP (TO to) (VP (VP (VB simplify) (NP (NN language))) (CC and) (VP (VB make) (S (NP (PRP it)) (ADJP (RBR more) (JJ accessible) (PP (TO to) (NP (NNS people)))))))))))))))) (. .)))