Many potential leaders never reach greatness because they feel they lack a mandate to lead.
Consider the case of Babur.
Babur ascended the throne of Fergana in in what is now Uzbekistan. It was 1494, when Spain was claiming Caribbean islands, and Babur was only 12 years old. At age 14 he led his forces to conquer Samarkand. Soon after, he lost Fergana, his original holding. Attempting to reconquer Fergana, he lost control of both.
Five years later, Babur tried to capture both again and failed. He should have become a tent maker, or used his influence to amass wealth along the silk road trade, which passed through the region. But he was the grandson of Timur (aka Tamerlane). It was his right to lead.
So Babur turned his attention southward.
He invaded northern India, and built the Mughal empire. It lasted until the British Raj in 1858.
The Muslim presence in India facilitated the export of Indian knowledge to Europe and the Arab world. This included mathematics.
Mathematics made commerce and industry possible. It made the technology revolution possible.
A common cause of failure to launch is what psychologists call Imposter Syndrome. Many people fear others will discover their inadequacies. “Only a matter of time before people figure out I’m a fraud, that I’m only pretending to be talented.” Amanda Palmer (of Dresden Dolls) calls it the Fraud Police.
You probably are faking it a little. Everyone is. You must be courageous anyway. We have to be comfortable with not being completely adequate, because no one is adequate.
Be like Babur. Be a tenacious, entitled brat. Just a little. And eventually you will become the leader you need to be. Then you’ll change the world.