Yes albeit it for infinite reasons...
Too few people in this world stop their governments from invading other countries and setting up negative foreign policy's.
The very act of people requesting their government to represent their hopes and dreams for the future is a catalyst for governments to oppress their own population.
Oppressed people will eventually revolt, leading into a civil war, and this cycle will re-occur every few generations until one succeeds.
Governments formed as a result of a civil war or rebellion usually end up destroying their country.
such countries will often be unstable for many more years to come and either be absorbed into neighboring nations or take many years to rise into a patchwork of a functioning nation.
Even if a country is formed through a peaceful separation from its former larger power, it usually follows victim to geopolitical foes of their former countrymen.
Resulting into another series of transitions of those in power.
These things always re-occur.
There are hopes that we can settle other planets before we consume the earth into a war of extinction.
However it is likely that such colonies will be founded by different nations, and will eventually have their own colonial wars and interplanetary and eventually interstellar wars.
Mankind will always be at war with itself as long as there are those seeking power over others and those who are unwilling to let themselves be enslaved.
We might change our the majority of our wars towards alien life forms should we encounter them one day. but we will never stop fighting among ourselves.
You see.... those who don't fight and set up a system that works will always be attacked by regimes who seek dominance for their very existence might give rise to ideas of fair treatment among-st their own people.
History unfortunately, always repeats itself in one form or another.
Think about it. Greece was once a great empire, persian, roman, Byzantine, mongol you name it. ALL great empires eventually fell.
All the countries we know of today, all alliances we know of today, will one day fall apart or be consumed.
And if one thing is consistent in the progression of time, its the increase in devastation wrought by weapons.
One day, should we no longer be bound to just earth, we will develop planet killing weapons or even ones that cause the destruction of entire solar systems...
Also, imagine if there were no wars ever, no murder no nothing but were unable to leave this planet. Eventually we would all die, like rabbits on an island without natural predators would. (the grass would not keep up with the eventual rabbit population)
Even if we could leave this planet, we would eventually fill the solar system until it can no longer sustain life, this would go on in larger and larger scales. The development of technologies to gain more habitable space would only buy us more time until we fail to develop a way that allows us to expand further and every inch of the universe dies from a form of starvation in whatever resources we need to sustain our numbers.
So yes we as living beings will always be at war. be it with ourselves, others, technology or nature. It is inescapable, perhaps even should we one-day manage to become incorporeal without a need for any kind of resource. Who knows what laws we might even then still be bound to. ^^"