The claim is an analytical interpretation of geopolitical power dynamics ('stronger position') and assigns intent/culpability ('wars they started'). While the evidence confirms that Russia and the US are involved in geopolitical tensions and conflicts, and that China's relationship with these powers is complex, the assertion that China is 'stronger' as a result is a subjective geopolitical opinion/analysis rather than a verifiable factual claim. None of the provided sources explicitly confirm this specific causal relationship as a factual certainty.