That's why the 45-year-old feels it's so important to raise both his daughter and his sons as feminists - although he admits that he didn't come to this place of realization all on his own.
The essay was published on October 11 to mark the International Day of the Girl.
The Prime Minister began by declaring he does some of his most important work not as a political leader but as a parent.
Trudeau, who notably appointed a Cabinet with an equal number of men and women, says he tries to do his part to level the playing field for women.
"I am going to keep saying loud and clear that I am a feminist until it is met with a shrug", Trudeau said at a UN Women meeting in March 2016.
'Every day, at home, I have the astonishing and humbling opportunity-together with my wife Sophie-to nurture empathy, compassion, self-love, and a keen sense of justice in our three kids, ' he wrote. "Gender equality is not only an issue for women and girls", he wrote for MarieClaire.com. "Sophie said, 'That's great, but how are you raising your sons to be strong advocates for women and girls, too?'" "All of us benefit when women and girls have the same opportunities as men and boys - and it's on all of us to make that a reality", Trudeau writes, adding, "I want my sons to escape the pressure to be a particular kind of masculine that is so damaging to men and to the people around them. Our sons have the power and the responsibility to change our culture of sexism".
Mr Trudeau writes: "I was talking about teaching Ella that she can be anything she wants to be". "I want them to be comfortable being themselves, and being feminists - who stand up for what's right, and who can look themselves in the eye with pride", he writes. "To raise our kids feminist is to honor their future, because they have the responsibility - and the power - to shape it for the better", he says.
Trudeau went on to define feminism as "the knowledge that when we are all equal, all of us are more free", and a "relentless commitment to look for ourselves in each other, because that's how we start to build a world where everyone is treated with respect and recognition".