Lewis Hamilton says he "won't let up" in his fight against injustice as the FIA decided not to investigate his actions at the Tuscan Grand Prix.
Formula 1's governing body had been considering whether Hamilton broke its rules in wearing a T-shirt highlighting police brutality at Sunday's race.
An FIA spokesman told BBC Sport an investigation had been ruled out.
Hamilton said: "Want you to know I won't stop using this platform to shed light on what I believe is right."
The Mercedes driver, writing on Instagram, thanked "those of you who continue to support me and show love, I am so grateful".
He added: "This is a journey for all of us to come together and challenge the world on every level of injustice, not only racial."
Hamilton's T-shirt, which he wore for the pre-race anti-racism demonstration and on the podium afterwards, said: "Arrest the cops who killed Breonna Taylor" and "Say her name".