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Nikki Haley, US ambassador to the United Nations, represented both a politically conservative 鈥� and provocative 鈥� approach to geopolitics, which wasn鈥檛 always in sync with the president. Here鈥檚 our look at how she influenced US global policy.

The arrival of a new climate change report calling for urgent action struck Monitor editors as the right moment to look at the financial and moral imperatives behind corporate efforts to tackle the problem.

To those advocating for police reforms in Chicago, the rare murder conviction for a Chicago cop is seen as a stepping stone toward a fairer justice system. What might come next?

Could the anti-immigrant nationalism of Europe find a similar foothold in Latin America? Waves of Venezuelan refugees are raising fears 鈥� and hardening positions 鈥� among Venezuela鈥檚 neighbors.

Living and reporting in Africa, Ryan Lenora Brown writes, is a daily process of 鈥渦nlearning鈥� 鈥� of learning to see beyond the one-dimensional stereotypes about the continent.

In scholarly work done more than three decades ago, economist Paul Romer proposed that societies look beyond the material drivers of long-term growth, such as oil, ports, or labor. Economic progress, he showed by dint of data, relies more on how well a society manages an intangible good: the discovery of new ideas that propel innovation.

Dr. Romer, now at New York University, especially focused on ways to reward people who come up with useful ideas in technology or management. He challenged fellow economists by asking questions like 鈥淲hat is the value of an idea?鈥�

On Monday, Romer himself was rewarded for his work. He won the Nobel Prize in economics. (He shares the prize 鈥� and its $1 million reward 鈥� with Yale University鈥檚 William Nordhaus, who won for being the first to calculate links between the economy and the climate.)

Romer鈥檚 influence can be seen today in the worldwide chase among nations to build an 鈥渋nnovation economy.鈥�

Many countries now vie for start-ups and bright students. They beef up basic research. They are more aggressive in guarding intellectual property, reflected in the current 鈥渢rade war鈥� between the United States and China. They promote creativity, curiosity, and freedom of thought. They idolize great inventors and innovators.

In the past, Romer says, countries practiced a 鈥渃omplacent optimism鈥� toward new ideas, from the cotton gin to assembly-line manufacturing to driverless vehicles. They saw inventions as something that mostly just happened and are external to the main task of adding 鈥渕ore inputs鈥� of workers, natural resources, and capital to gain 鈥渕ore outputs.鈥�

鈥淓very generation has underestimated the potential for finding new ... ideas,鈥� he wrote. 鈥淲e consistently fail to grasp how many ideas remain to be discovered.鈥�

Yet innovation must be managed and promoted (such as in the awarding of prizes like the Nobels). Romer鈥檚 approach is perhaps best summed up in his famous saying, 鈥淎 crisis is a terrible thing to waste.鈥�

On climate change and the need to reduce carbon emissions, for example, he believes that once governments provide the right incentives for innovation in energy research, 鈥淲e will be surprised that it wasn鈥檛 as hard as we anticipated.鈥�

In the US today, industries that rely intensively on patents and other intellectual property account for more than a third of the gross domestic product. Their growth outpaces industries that rely little on intellectual property. As Romer puts it, 鈥淧ossibilities do not add up. They multiply.鈥�

In other words, long-term economic growth as well solutions for climate change can be found in understanding how to tap the many ideas as yet undiscovered.