determined by occasion/audience
different times: future, past, present/ever
Late 5th c. to early 4th c.: Antiphon, Andocides, Lysias
Mid 4th c.: Isocrates, Isaeus
Mid or late 4th c: Demosthenes, Aeschines, Hyperides, Lycurgus, and Dinarchus
Translations/notes for all speeches: Oratory of Classical Greece (University of Texas); 16 volumes, 1998-2018. At Oxford, Solo gives access to all (except the last Demosthenes volume) as ebooks through De Gruyter. More than 3000 pages of speeches, letters, and pamphlets. J. Ober, Mass and Elite in Democratic Athens (Princeton, 1989), 341-363 has helpful appendix that gives brief summary details for every item in the corpus.
From antiquity through to the modern era, Demosthenes was one of four canonical authors (Demosthenes; Homer; Cicero; Virgil) that formed a core canon in schools.
Core sub-set of Demosthenes’ speeches about Philip (Philippics) and Demosthenes himself (On the Crown) have long afterlife until WW1.
Sees Demosthenes as the last voice of Athenian independent democracy.
Demosthenes and his political/legal opponent Aeschines in their courtroom battles provide (conflicting) narratives of mid-4th. c. political and military history (and we lack contemporary narrative histories; cf. Herodotus, Thucydides, Xenophon).
Attention shifts away politics and war. Private courtroom orations offer wealth of information about more broad-ranging topics. Court cases on mundane topics give glimpses of home and family life, ideology and morality. K. J. Dover, Greek Popular Morality (1974) and Greek Homosexuality (1978).
Others write private courtroom speeches too: Lysias, Isaeus, and Isocrates.
Oratory as data for study Greek law as technical field, with complementary epigraphical sources.
Similar interest in minute workings of 4th-c. Athenian democracy, which is much better attested than 5th c. Some scholars (Hansen, Rhodes) stress uniqueness of Athens. Others (Ober, Cartledge) compare Athenian and modern democracy, with more focus on ideologies and attitudes.
Athenian funeral orations. On Loraux and ideology see D. M. Pritchard, The Athenian Funeral Oration After Nicole Loraux (due to appear in next few months).
Isocrates: abundant writings illustrate a different civic ideal and a pan-hellenistic outlook.