The event in Boston helped to unite the colonies against Britain. What started as a minor fight became a turning point in the beginnings of the American Revolution. The Boston Massacre helped spark the colonists' desire for American independence, while the dead rioters became martyrs for liberty
The emergence of the concept that parliaments, rather than Kings, had ultimate political authority in European states. I think
Time is the most beneficial- watch this video to learn why. https://www.youtube.com/watch?v=RRWggYusSds