How #BlackLivesMatter became a worldwide rallying cry

Activist AliciaGarzafelt physically sick to her stomach when George Zimmerman, the self-appointed neighbourhood watch volunteer, was acquitted of murder in July 2013 for the shooting of unarmed black teenTrayvonMartin in a gated community inFlorida.

Garza, then 32, usedFacebookas an outlet for her grief and frustration in a now-famous post in which she wrote "black lives matter."Joined by two otherrights activists who added the hashtag, #BlackLivesMatterwas born.

It wasn't until Michael Brown, another unarmed black man, was shot and killed by a white police officer in the St. Louis suburb of Ferguson more than a year later that thehashtagbecame an international phenomenon.

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#BlackLivesMatter peaked on Twitter on Nov. 24, 2014 when it was announced that a grand jury haddeclined to indict Darren Wilson, the officer who had shot and killed Brown following a confrontation.

Organizing byhashtag

In the weeks and months that followed, the movement jumped from the keyboardto the streets with die-ins and rallies, as well as calls for police body cameras and changes to police training.

In the process, #BlackLivesMatterbecame the touchstone foranew generation of voicesthat challenged theorganizational structure of civil rights activists of the previous generation, saysYohuruWilliams, a history and black studies professor at Fairfield University in Connecticut.

I want to know that if I'm pulled over by the police that there is not a chance of me becoming the next hashtag.- Toronto human rights activistAkio Maroon

"We are looking at a responsive, organic reaction to police violence," Williams says, referring to the fact that, as with the Arab Spring uprising, #BlackLivesMatter connected like-minded people through social media.

"But it's somewhat problematic," he goes on."It's still a relatively small number of people on the ground who are doing the work and a lot of people remainarmchair activists."

From clicktivism to activism

#BlackLivesMatterwas predicated on the populist logic of Silicon Valley that anyone with an idea can harness communicationstechnology to start a global social movement.

Twitter users in the Middle East have also deployed thesehashtags like #BlackLivesMatter, #ICantBreathe(a reference to the death of Eric Garner by an NYPDchokehold)and #Ferguson to show their solidarity.

#HandsUpDontShoot was anotherhashtagthat galvanized the newdigital civil rights movement.

But while the movement seems to have sustained its energy, it has not capped the growing list of black citizens killed by the police in the U.S.

Most recently, severalblack women in the U.S. have died while in police custody, including Sandra Bland, sparking the hashtag#BlackWomenMatter. Buttheir cases haven't always sparked the sameoutpouring of media attention.

In Ferguson, renewed violence broke out this week during events to markthe one-yearanniversary ofBrown'sdeath. Among other things, it showedthefrustration of manyyoung African-Americans who have not seen their relationship with police improve in the last year.

"There have been all these incidents, despite the body cams, despite the dashboard video, despite the national conversation, these incidents continue to play out," Williams said.

Another sign of this frustration came whenDemocratic presidential hopeful Bernie Sanders was booted off stage during a campaign rally last weekby #BlackLivesMatter members demanding he focus moreon racial equality.

The event sparked a wave of backlash against #BlackLivesMatters protesters and discord within the movement.

The controversy caused Garza to pause her vacation and re-enter the online fray, to encourage people to take few deep breaths and focus.

"We didn't start the movement. We are contributors to it," shewrote on Facebook on Monday."We embrace a diversity of tactics and strategies."

According to itswebsite, #BlackLivesMatter'snational demands are specifically related to police reform, including calling forthe arrest of DarrenWilson, police training andthe release of the names of all officers involved in killing black people within the last five years.

However, its sense of itself as just one voice among many may prove problematic for a movement that lacksa central body.

"You have to think about the larger ask, and that is hard for a movement whose strength has been local," says Williams. "Itwill be a sticking point for younger activists," who, like those in Ferguson this week, "are coming together to say 'We're not going to leave until we see some real change.'"

'Shout as loud as we can'

Akio Maroon is a community organizer and human rights activist with The Network for the Elimination of Police Violence in Toronto. She says the #BlackLivesMatter unified people acrossthe border over police brutality.

"Ending police violence is not just an American thing," she says.

"Toronto can be more unified in how we tackle racial profiling, carding and police-sanctioned violence," Maroon argues, pointing toAndrew Loku and Jermain Carby as two examples of unarmed black men killed in Canada by police in the last year.

Black Lives Matter is doing a great job at keeping the attention focused on where it needs to be, Maroon says.

But, she says, there are many "arms and legs and tentacles" working for one cause.

"We need to shout as loud as we can.I want to know that if I'm pulled over by the police that there is not a chance of me becoming the next hashtag."