If you could erase one event from history, what would it be?

If I were to erase an event from history, it would be the formation of the first political boundaries. Boundaries and borders have caused everything from conflict to mistreatment and discrimination.

In the past few centuries, there has been a number of significant wars, including the conquests of Mongol ruler Genghis Khan and his sons, which killed tens of millions of people, and the two world wars, in which as many as 100 million may have been killed.

Ask yourself this: What was the main aim of the people, such as Genghis Khan, and dictators like Adolf Hitler and Benito Mussolini, who were responsible for these conflicts? Land expansion, of course! Think about it, if the world was borderless, then many of the bloody wars that have happened over the centuries may have never taken place.

Even now, borders have a huge impact on our lives. If you look at most countries, a large percentage of their annual budget is used for defence. For example, the US spends more than US$500 billion on its military every year. And what is the main aim of defence? To protect borders. Once again, the border is the main culprit.

Just imagine if we had a borderless world, and instead of wasting money on defence, it could be used mainly for improving medical care, or looking for sources of renewable energy, so the world could become a better place.

I'm going to be selfish here and erase one of the events in my own "history" rather than acting for the greater good and erasing something like a war that caused a lot of deaths.

One event I really wish did not exist is my introduction to the song Stitches, by Shawn Mendes. You might think this is a perfectly well-written song, so why would I want nothing to do with it? I'll tell you why: Stitches keeps coming up randomly in my life so often that I have begun to hate it. No matter where I am or what I'm doing, the tune will pop up into my head and wreck my train of thought. And believe it or not, I'll be left sitting on a chair blindly jamming to Stitches.

The funny thing is, I haven't even watched the music video or downloaded the song on my phone, and I don't know the exact lyrics. All I keep singing is the line: "I'm without your kisses, I'll be needing stitches." (I got it by googling the lyrics).

The song has ruined my life. Whenever I try to concentrate on a test or my homework, there it is, in my mind. Darn you, Shawn Mendes, for making your song so catchy.

Definitely the Holocaust. When more than six million innocent people die just because of their religion and beliefs, it's an outrage. When two out of three Jews get killed because of an "unfair" opinion of the Nazi regime, it's horrifying. This "Final Solution" is simply revolting.

If this happened in Hong Kong - six million dying for no reason at all - then only one million people would be left here. If the Holocaust happened in a small country like Antigua and Barbuda or the Marshall Islands, again, six million dying for nothing, the whole population of those tiny countries would be wiped out!

And the Holocaust didn't just kill Jews, it also decided the fates of 200,000 gypsies and another 200,000 mentally or physically disabled patients, most of them Germans, who were led to their death in the "euthanasia programme". Between two and three million Soviet prisoners of war died, because of the Nazis ignoring the Geneva conventions, which would have kept those prisoners alive. Even communists, socialists, and trade unionists died. If the Holocaust hadn't happened, more than 8.9 million people would have lived a normal life.

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