dès lors

from then on

→ dès
phrase Rare #42,942
from then on Can also mean “therefore” or “from that point onward,” depending on context. It is somewhat formal and is often followed by a comma when used at the beginning of a sentence.
FR: Dès lors, nous avons changé nos plans.
EN: From then on, we changed our plans.

Dès lors je ne savais plus quoi faire.

From then on, I no longer knew what to do.

Dès lors, j'ai su que ce serait lui.

From that moment on, I knew it would be him.

— Mirage (2018)

Dès lors, son père la croit victime d'une anomalie cardiaque.

From then on, her father believes she is suffering from a heart abnormality.

— Le Fabuleux Destin d'Amélie Poulain (2001)

Elle était dès lors hors de danger.

She was now out of danger.