ASTANA (Reuters) – President Vladimir Putin used a speech to Asian leaders on Thursday to develop a theme that he has pressed more intensely as Russia’s military fortunes have waned: that Moscow is fighting the West to establish a fairer world. With Western economic sanctions also tightening, Putin has shifted his emphasis from fighting alleged “fascists” in Kyiv to confronting a “collective West” that is arming Ukraine with the supposed aim of expanding its influence at Russia’s expense. “The world is becoming truly multi-polar,” Putin said. “And Asia, where new centres of power are emerging,…