Life arc hint #2: Consider entire systems.
Stick a hand in and feel their flows. Think about their evolution. Dream of massive dialectic shifts. Time when they will occur. Think about what you can do to participate, dampen, or accelerate.
That could be writing a book. Or working for someone who is. Or starting a company, or blowing something up, or funding a new project. Or pivoting an existing organization. Or setting yourself on fire in front of the right people.
But always think huge. Because it increases your chances of mattering. Most of humanity was anonymous and lost to dusty history. Do not fall into their ranks.
If you do this right, engaging in arguments about particular actors (mostly in politics) becomes a nonstarter. It is tough to bicker when you can think through how to solve the underlying problem.
A word to the wise. Marx matters not because he wrote, but because Engels took his unfinished tome and finally shipped the damn thing. Produce. And, unlike Marx, try to be able to care for your family.