How can we make sure it's impossible for us to commit any sin or violence?

Question

Is there a way to make committing violence impossible?

Can someone do something so that it will be impossible (or at least very difficult) for him to commit any violence in any corner of the world?

Answer 1

Yes, it's quite possible to live whole life without violence.

Probably you meant only "killing", but you generalized it as "violence". The word "violence" is a kind of "violation". According to Mahatma Gandhi, "Violence" can be done using words, thoughts, actions as well.
"killing" is just an act, while "violence" is a state of the act. "Rightful killing" is not "violence", while "Wrongful word" is "violence".

"Natural act" is not violence. In case of war, it's natural for people to kill each other, that's why it is War. That's not violence. But when there are riots, people harm/kill others by violating law of land. That is violence. From Gita, Krishna says:

[BG 18.47] — Defective (faulty) Swa Dharma is better than well performed Para Dharma; Naturally prescribed performance of Karma never achieves sinful reactions.

[BG 18.48] — O son of Kunti, trivial(natural) Karma should never be given up even though (they are) defective; All initiations (of Karma) are defective, like how smoke covers the fire.

Every actions have faults in it. With that they all will become sinful! But our concern should be not to be bound by such sinful reactions. That happens when we act in Swa Dharma, i.e. acting naturally. That is also called SAtvika way of life. That is better than RAjasika and TAmasika ways. However, everyone has all these 3 gunas more or less.

Killing can be SAtvika at times, because it's not always equated with "violence". Violence is sinful and is never prescribed.
But imagine, can we live the way we do without killing insects and bacteria or other harmful living beings, even though they are humans. According to vedic injunctions, below are the instances when there is no sin in killing such person; i.e. "killing" such entity is not considered "violence":

1. one who gives poison
2. one who sets fire to the house
3. one who attacks with deadly weapons
4. one who plunders riches
5. one who occupies another’s land
6. one who kidnaps a wife

When person doesn't act because he/she perceives it to be painful then it's a wrongful abandonment of Karma which is RAjasika. It's never auspicious:

[BG 18.8] Thinking all Karmas to be painful, if they are abandoned with fear of bodily pain, then it is RAjasika abandonment; One never attains the (proper) fruit of such sacrifice.

In your case, you may think of committing least violence by neither doing yourself nor entertaining others who do (i.e. least purchase of animal products). If anyhow the killing is required (e.g cutting trees), then try to give back to nature by either preserving them or growing them.