The 'people' group
These nouns refer to groups of people. Some of them are always or typically preceded by the: see Section 14.Some nouns which refer to groups of people, for example nobility and public, are collective nouns: that is, they can be followed by either a singular or a plural verb. See Section 7.
all-comers ancients armed forces authorities boat people brethren chattering classes city fathers clergy cognoscenti country people craftspeople dramatis personae dregs emergency services fellow folk forces fuzz gentry glitterati greats hoi polloi in-laws kin kith and kin lads literati masses menfolk military police paratroops people personnel police progeny ranks reinforcements rowdies scum shock troops staff townsfolk townspeople tradespeople troops womenfolk working people workpeople youth
My in-laws are coming over for dinner.
The masses have the right to elect their president.
Many people might be surprised by the extent of the change that has taken place recently.
I'd pull those troops out right now.