The second point of emerging consensus is that a fundamental remaking of that order has become essential. The American role in preserving the old order had become counterproductive and unsustainable, ...

In Africa, the approach to security threats fails when it neglects to replace the social functions these armed groups perform in their regions. The multilateral peace and security system performs ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Amanda Bellucco-Chatham is an editor, writer, and fact-checker with years of experience ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Amanda Jackson has expertise in personal ...

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Materials science is an interdisciplinary field concerned with the understanding and application of the properties of matter. Materials scientists study the connections between the underlying ...

Cell biology is the discipline of biological sciences that studies the structure, physiology, growth, reproduction and death of cells. Research in cell biology uses microscopic and molecular tools and ...

Serotonin is a neurotransmitter and hormone that helps regulate mood, sleep, digestion, blood clotting, and sex drive. Your body makes it from tryptophan, an amino acid found in meat, dairy, eggs, and ...