Nature generates no waste.
Composting is nature's circular economy in action. An economy where the currency is nutrients. When living creatures - plants and animals - cross the rainbow bridge and fall to the forest floor, they become food for microbes, bacteria, and other living organisms (like wormies) that eat the decaying matter as food. This decomposition breaks down complex molecules to smaller nutrient fragments in the soil that are then used up by plants to grow.
The soil food web is complex, and it is hard to know how humans fit into it, but we have to learn! The human world is currently quite linear - we extract, process, consume, and finally discard. From the land and into landfill.
Composting can change that. Together, WE can change that in our lifetime by re-imagining our kitchen waste as simply soil-yet-to-be-made. 
Linear Food System
If we can view our food scraps as a valuable resource rather than waste we can generate a circular food system. This means that the nutrients in your food are restored through natural processes. We never have to contribute "new" materials into the system (such as inorganic fertilizer, or GMOs), nature takes care of that for us. 
the circular waste system
the circular waste system
One way to achieve this is through composting. Nutrients in our food waste can be conserved and returned to the soil through composting organisms such as wormies! After they process their food, the nutrients they leave behind are absorbed by plants. Plants can grow to be more nutrient rich this way compared to with inorganic fertilizers, which are designed to make things grow fast, not strong.
why compost diagram
If we eat more nutritious, local food, we are not only fueling ourselves, but also the soil and the local economy! If each of us composted and used our compost to grow our own food (or help out a neighbourhood community garden), we could reduce food waste, reduce the use of harmful fertilizers, and create a circular food system!
worm character talking about small actions lead to a big impact
In case you needed another reason to start composting, here is a very catchy song that can get stuck in your head for weeks! Enjoy!