I.against [Am əˈɡɛnst, Brit əˈɡɛnst, əˈɡeɪnst]PREPagainst often appears as the second element of certain verb structures in English (come up against, guard against, turn against, etc). For translations, see the relevant verb entry (come, guard, turn, etc).
He successfully employed alcoholic vapours, and a varnish of his own invention, to protect paintings against the destructive influence of the atmosphere.
Typically, no action has been taken by governments against such usurpation: the viewpoint is rather the contrary, namely that comunidades should disappear.