For example, sports conferences are typically artificially structured to make future champions unpredictable in the medium term. The pro team that does worst this year typically gets the first draft pick of amateurs next year. In the NFL, the schedule is gerrymandered to give this year's worst teams the easiest row to hoe next season. This helps make the NFL more interesting.
The longest article in my 1971 edition of the Encyclopedia Britannica appears to be the enormous entry on "World Wars" (lumping WWI and WWII together as two acts of one sad story). So, you could plausibly argue that the World Wars were (at least in the judgment of the editors of the E.B. in 1971) to be the most interesting thing in the entire universe.
It starts with a long description of the breakup of Bismarck's system of alliances that he forged in the 1870s when Germany tried to be allied with or at least neutral with every Great Power except the irreconcilable French. So, a major war was pointless because everybody was reasonably content with their lot on the European continent, except France, which wanted Alsace and Lorraine back. But France wasn't strong enough to take on Germany alone, and nobody else had much incentive to help France out. So, Great Power conflicts were rather dull in the 1871-1890 period.
As Germany became more globally ambitious in the late 19th Century and early 20th Century, however, this lopsided system broke down. The new Kaiser's bumptiousness, for instance, drove the Russian autocracy into an unnatural alliance with the French Republic.
Europe evolved toward a balance of power in which the two alliances were perfectly balanced. One mechanism driving this tendency toward equality of power (and thus unpredictability of the results of a war) was that the weaker side, at any point in time, had more incentive to bid more for a currently neutral power's allegiance than the stronger side.
The outcome was that the two alliances were so balanced that WWI went on, to the surprise of the participants, for a catastrophic 4.3 years.
It doesn't exist in every situation. For example, there isn't an endless article in the Cncyclopedia on the wars between the U.S. and Canada. The balance of power between the two countries is so out of balance that there's no point to conflict, so the history is famously boring.
But the kind of things that interest people most, such as Republicans vs. Democrats, are the ones where a balance has evolved that makes uncertain who will win.