By asking the most personal question like:
where to we buy? What do we buy? what do we eat? How do we treat others? How do we treat our belonging?
We are tied to the biggest questions. They tie us to the economic, political, social and ecological order of our whole planet. For example: Veganism is not the answer. Eating dairy and meat is not the cause of our problems. It is merely a symptom revealing how the world is organized, which incentives are given, how economical goals mess with other aspiration (like ending hunger or mitigating climate change). But if veganism is the entry point to asking what we can do to change the causes, it is the perfect answer.
What we do is within our control. The personal is the political.