This quote suggests that the issue of overpopulation cannot be solved merely by technological advancements or scientific breakthroughs. Instead, it demands a profound shift in our moral compass. It calls for a more conscientious, ethical approach to reproduction and resource consumption, acknowledging that our planet has finite resources that must be shared equitably among all its inhabitants.

The "fundamental extension in morality" refers to a need for a deeper, more profound understanding of our responsibilities – not only to our own generation, but also to future generations. This means considering the long-term impacts of our actions, particularly in terms of resource consumption and environmental degradation, and making choices that ensure the sustainability of our planet.

In today’s context, this quote is incredibly relevant. As we face issues like climate change, environmental degradation, and resource scarcity, the need for a shift in our collective morality becomes increasingly apparent. We can no longer afford to ignore the impact of our actions on the environment and on future generations. This calls for a change in our lifestyle choices, consumption patterns, and policies towards more sustainable practices.

On a personal level, this could mean adopting more environmentally friendly habits, such as reducing waste, recycling, and choosing sustainable products. It could also involve advocating for policies that promote sustainability and equity, such as renewable energy, sustainable agriculture, and fair trade.

In essence, this quote is a call to action. It urges us to move beyond our current focus on immediate gratification and short-term gains, and to start considering the long-term consequences of our actions. It reminds us that we are not isolated beings, but part of a larger, interconnected system, and that our survival depends on the health and well-being of this system as a whole.