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Eubulus was generally considered a member of the "peace party", in opposition to Demosthenes.
Eubulus attempted to preclude Philip of Macedon's intervention in Greek affairs by forming a Common Peace, in which effort Eubulus was joined by Midias, Aeschines, and Phocion.
When Demosthenes wanted to renew the war after Philip went into Phocis, Eubulus and his supporter argued for peace, but from 344 on, Eubulus' influence was waning, and by 342 Demosthenes' party was in control.