सामंती युग के अंत में यूरोपीय विदेशी व्यापार के पुनरुद्धार में निम्नलिखित में से कौन सा एक सकारात्मक कारक बनने के बजाय एक विनाशकारी जनसांख्यिकी संकट था?

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?