How do you think the world would have be different iIf Alexander had lived another 30 years?

After Alexander retained several serious injuries in India he had decided to invade the Arabian peninsula (a region simply called Arabia in ancient history). However, that campaign did not occur as a result of his death.I do believe that if he didn't live. He would have indeed invaded and conquered the vast Arabian region. Of course hellenizing the culture. I believe he would have recampaigned in India (theoretically in this explanation his troops would have had to have high morale otherwise mutiny was certain). Having a established an Indo-Grecian civilization he would have continued east further into Asia. Possibly into South East Asia or if he went North into Nepal and then China. I doubt he would have gone west. In those times the east was filled with riches and nothing but barbaric tribes in Europe west of Greece. In all fairness I doubt Alexander would have lived much long after 323 B.C. Whether it happened a year or a decade later, Alexander would have likely died in battle or due to political assassination. He would likely have been killed in battle in India or killed during mutiny in India by his own soldiers. I disagree with the notion that Christianity would not have spread and Greek polytheism becoming the world religion. Just as Christianity spread under Roman Imperial rule so it would have under Greek. The world would be very different despite.