6 0 s ▁and ▁the ▁ 1 9 7 0 s ▁were ▁often ▁political ▁in ▁nature . ▁Student ▁ri ots ▁may ▁also ▁occur ▁as ▁a ▁result ▁of ▁opp ression ▁of ▁peace ful ▁demonstr ation ▁or ▁after ▁sport ing ▁events . ▁Stud ents ▁may ▁const itute ▁an ▁active ▁political ▁force ▁in ▁a ▁given ▁country . ▁Such ▁ri ots ▁may ▁occur ▁in ▁the ▁context ▁of ▁wider ▁political ▁or ▁social ▁gr iev ances . ▁ ▁Urban ▁ri ots ▁are ▁ri ots ▁in ▁the ▁context ▁of ▁urban ▁decay , ▁prov oked ▁by ▁conditions ▁such ▁as ▁disc rim ination , ▁pover ty , ▁high ▁un emp loyment , ▁poor ▁schools , ▁poor ▁health care , ▁housing ▁in ade qu acy ▁and ▁police ▁brut ality ▁and ▁bias . ▁Urban ▁ri ots ▁are ▁closely ▁associated ▁with ▁race ▁ri ots ▁and ▁police ▁ri ots . ▁ ▁Effect s ▁ ▁The ▁economic ▁and ▁political ▁effects ▁of ▁ri ots ▁can ▁be ▁as ▁complex ▁as ▁their ▁orig ins . ▁Property ▁destruction ▁and ▁harm ▁to ▁individuals ▁are ▁often ▁immediately ▁meas urable . ▁During ▁the ▁ 1 9 9 2 ▁Los ▁Angeles ▁ri ots , ▁ 2 , 3 8 3 ▁people ▁were ▁injured , ▁ 8 , 0 0 0 ▁were ▁arrested , ▁ 6 3 ▁were ▁killed ▁and ▁over ▁ 7 0 0 ▁business es ▁burn ed . ▁Property ▁damage ▁was ▁estimated ▁at ▁over ▁$ 1 ▁billion . ▁At ▁least ▁ten ▁of ▁those ▁killed ▁were ▁shot ▁by ▁police ▁or ▁National ▁Guard ▁forces . ▁ ▁Similarly , ▁the ▁ 2 0 0 5 ▁civil ▁un