Frequently used as a plural-only noun meaning 'ancestors' or 'previous circumstances'; treated as a lexicalized plural.
The candidate’s aristocratic antecedents were well known.
Аристократические предки кандидата были хорошо известны.
To understand the conflict, we must examine its historical antecedents.
Чтобы понять конфликт, мы должны изучить его исторические предпосылки.