The leaf, for now, remains on his driveway. And the war, as all good neighborhood wars do, continues in perfect, miserable, and utterly human silence.

The breaking point was the lawn. Not the mowing—I kept my grass at a reasonable two and a half inches. No, this was about the edge . The strip of grass between the sidewalk and the curb, a no-man’s-land technically owned by the city but maintained by the residents. Harold had taken to mowing his side with a ruler and a spirit level. One Saturday, I returned from a grocery run to find that the entire three-foot strip in front of my house had been scalped down to the dirt. On my front step, a new note: “Your negligence invites weeds. I have corrected it. You’re welcome.”

I tried everything. I baked banana bread. He let it sit on his porch until it grew a blue constellation of mold, then placed it back on my doormat with a note that read simply: “Return to sender. Allergen.” I attempted a conversation, catching him as he retrieved his mail. He was a thin man, all sharp angles and knuckles, with eyes the color of over-steeped tea. When I said, “Harold, let’s talk this out,” he looked at me as if I’d suggested we set his house on fire for the insurance money. “The time for talk was before the leaf,” he said, and shut the door.

The escalation was slow, then sudden. The shared fence, a respectable cedar structure, developed a series of small, deliberate holes—just at my eye level, as if to remind me that observation was a two-way street. My Wi-Fi signal began to drop at random intervals, and a friend with a networking scanner discovered a new, aggressively named network: “GETOFFMYCHANNEL.” I couldn’t prove it was him, but I knew it the way you know a storm is coming by the ache in your bones.

That was the sentence that broke me. You’re welcome. The sheer, unhinged politeness of the tyranny.

Last week, I saw Harold outside, staring at the tree. The wind was picking up, a prelude to autumn. A single leaf broke free, twirled in the air for a long, suspended moment, and then, with the gentlest of descents, landed exactly in the center of his clean, gray driveway. He didn’t move. He just stared at it. Then, slowly, he turned his head and looked at my house. At my window, where he knew I was watching.

The trouble began not with a bang, but with a leaf. One October afternoon, a single maple leaf from the ancient tree in my yard—a tree planted by the original owner of the house in 1957, a fact I would later cite with the fervor of a constitutional lawyer—drifted across the property line and landed on Harold’s newly power-washed driveway. Within an hour, a fluorescent orange sticky note appeared on my front door: “Your debris. My property. Clean it.”