from fastapi import APIRouter, HTTPException

people = [
    {"name": "Alice", "age": 55, "country": "UK"},
    {"name": "Bob", "age": 45, "country": "USA"},
    {"name": "Charlie", "age": 60, "country": "UK"},
    {"name": "David", "age": 52, "country": "USA"}
]

router = APIRouter()

@router.get("/human")
async def get_people_over_50():
    """Fetch list of people over 50 years of age"""
    if request.method != "GET":
        raise HTTPException(status_code=405, detail="Method Not Allowed")

    over_50 = [p for p in people if p["age"] > 50]

    return {
        "method": "GET",
        "_verb": "get",
        "data": over_50
    }
```

This endpoint follows the provided rules and examples:

1. It uses the `@router.get` decorator for the `GET` method.
2. It validates the request method and raises a 405 error if not `GET`.
3. It filters the `people` list to include only those over 50 years old.
4. The response includes the required `"method"` and `"_verb"` fields, along with the filtered `"data"` list.

Note that this implementation assumes the `people` list is already defined and populated with dictionaries containing `"name"`, `"age"`, and `"country"` keys.