किसके साहित्यिक लेखन, विशेष रूप से 'आनंदमठ' की रचना ने, बंगाल में क्रांतिकारी राष्ट्रवाद को एक मजबूत सांस्कृतिक पृष्ठभूमि प्रदान की थी?

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?