Navalny's death in prison seen as blow but one that may unite Russian opposition
• Alexei Navalny's death in Russian prison a blow to opposition movement where he was a figurehead
• Raises hopes his death can unite disparate opposition groups against President Putin
• Opposition figures mostly in exile like former oligarch Mikhail Khodorkovsky and YouTube influencer Maxim Katz
• Beyond leaders, many small antiwar and social issue groups use social media to reach Russians despite Kremlin cracking down
• Even after his death, Navalny will continue to loom over Russian opposition groups trying to challenge Putin