Religion in the Australian Census

Following up on my earlier post, here is a chart of religion in Australia, by age (as per the 2016 Census, with percentages on the vertical axis relating to the population of Australia as a whole, and excluding people with no religion specified). Coloured areas in this chart indicate the total number of people for each religious group:

The changing religious landscape is revealed by the variation with age. For people aged 65, the population is 25% Catholic, 24% secular, 22% Anglican, 16% other Christian, 7% Uniting Church, 2% Buddhist, 1% other religion, 1% Muslim, and 1% Hindu.

For people aged 25, it’s 47% secular, 21% Catholic, 11% other Christian, 8% Anglican, 4% Muslim, 3% Hindu, 3% Buddhist, 2% Uniting Church, and 2% other religion. The chart below shows these relative percentages, for each age cohort.

Immigration and children are keeping the Catholic Church stable in size, but the Uniting Church is in collapse, and the Anglican Church is not doing much better (other data suggests that it’s in collapse outside of Sydney). The “big three” non-Christian religions (Islam, Hinduism, and Buddhism) are more than 10% of the age-25 demographic. The chart also shows the impact of student-driven Indian immigration to Australia over the past decade or so – there is a visible peak for Hinduism around age 33.

There seems to be something odd about the religion given for young children up to age 13 or so – some parents (especially Catholics) seem to be listing young children as “no religion.” This might reflect delayed baptism. However, it also seems that many children lose their childhood religion in late teens and early adulthood.

Mean ages for adults within the different groups are Hindu: 37.1, Muslim: 37.7, secular: 42, other religion: 42.6, Buddhist: 43.5, Catholic: 48.6, other Christian: 50.4, Anglican: 54.8, and Uniting Church: 55.8. The last two groups in particular are skewed towards older people.


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Lotus Blue: a book review


Lotus Blue by Cat Sparks (377 pages, published 2017)

I recently read, with great enjoyment, the hot new post-apocalyptic novel Lotus Blue by Cat Sparks. I’m a sucker for the genre, and this novel has shades of Dune, Mad Max, A Canticle for Leibowitz, and the works of Roger Zelazny – yet is not derivative. As a fan of the trans-Australia World Solar Challenge, I particularly liked the caravan of solar trucks on the cover. The cover also shows the falling satellite which marks the emergent threat to the world of the novel.

While opening with a solar-powered trading caravan, the novel has a few flashbacks to the three centuries of war that created the dystopian world of the story: “Mighty tankers were on the move, travelling in tight formation grids. Working together, not attacking each other. Not something you saw every day. Those mechabeasts had once roamed wild and free, following their own whims, their own flights of fancy. But something had changed. Something had gotten hold of their minds. Synchronous rhythm locked them into step. For Marianthe, the sight brought on a stream of flashbacks: glory days, when command and strategy spiked through her arteries like a virus. Like a drug. A platoon full of hearts beating in syncopation. You could feel your brother and sister soldiers, know they had your back, your breath, your sweat.” I’m trying to avoid spoilers, but of course that savage past collides with the protagonist’s present, and that’s where the adventure begins.

Some readers seem to have found the world, and the range of characters, somewhat confusing; I thought the level of complexity of the novel was just about perfect. I enjoyed both the characters and the world in which they were set. This book has had a fair bit of revision and polishing before hitting the shelves, and it shows (although a plethora of typos suggests some rather poor final editing). My only real complaint was that, although I liked Star, the 17-year-old protagonist, I would have liked to have seen more of her older sister Nene, the healer (why does Nene just vanish from the story?). With luck, this novel will have a sequel or two.

By the way, a blog post I read recently suggested that the protagonist of a young adult (YA) novel should:

  • Be aged between 15 to 18 years old (Star is 17)
  • Be autonomous from his or her parents (Star is an orphan)
  • Embark on a journey which has to do with coming of age or some sort of rite of passage (Yes, she does)
  • Learn something about who he or she is (Yes, in spades)
  • Have a ‘voice’ that readers can relate to (Yes again)

So OK, this is a YA novel, although it has not been specifically marketed as such. What that means is that it suits the age range from 14 up to and including adult (as opposed to, say, Great North Road, which is written for adults only). Having said that, for the benefit of parents of younger readers, I should point out that there is some bad language, but that the only mention of sexuality is 25 words on page 3: “Remy. Star should never have slept with him. He’d been hanging around her ever since, as if she would ever make the same mistake again.” And Star has quite a clear sense of what is, and is not, the right thing to do.

For me, this novel ended with a “Planet of the Apes” moment, since Cat Sparks has set part of the novel in the vicinity of her home town of Canberra, Australia. Calling one of the fortress cities “Nisn” was a clue I missed first time around – but I could hardly miss the reference to the Brindabella Range. I also finished this book with a strong sense of wanting to read more from this author. Lotus Blue was one of the best books I’ve read this year.


Lotus Blue by Cat Sparks: 4 stars


Australians know that the world is round

Following up on my earth-measuring post, people have known for more than 2,000 years that the earth is round. In 350 BC, Aristotle wrote “The evidence of the senses further corroborates this [that the earth is spherical]. How else would eclipses of the moon show segments shaped as we see them? As it is, the shapes which the moon itself each month shows are of every kind straight, gibbous, and concave-but in eclipses the outline is always curved: and, since it is the interposition of the earth that makes the eclipse, the form of this line will be caused by the form of the earth’s surface, which is therefore spherical. Again, our observations of the stars make it evident, not only that the earth is circular, but also that it is a circle of no great size. For quite a small change of position to south or north causes a manifest alteration of the horizon. There is much change, I mean, in the stars which are overhead, and the stars seen are different, as one moves northward or southward. Indeed there are some stars seen in Egypt and in the neighbourhood of Cyprus which are not seen in the northerly regions; and stars, which in the north are never beyond the range of observation, in those regions rise and set. All of which goes to show not only that the earth is circular in shape, but also that it is a sphere of no great size: for otherwise the effect of so slight a change of place would not be quickly apparent.” (On the Heavens, II, 14).

Around the year 700, Bede wrote “We call the earth a globe, not as if the shape of a sphere were expressed in the diversity of plains and mountains, but because, if all things (terrestrial) are included in the outline, the earth’s circumference will represent the figure of a perfect globe. Hence it is that the stars of the northern hemisphere appear to us, but never those of the southern; while on the other hand, the people who live on the southern part of the earth cannot see our stars, because the globe obstructs their view.” (De Natura Rerum). Australians verify his statement about stars every night.

I have commented previously on how the medieval poet Dante described time zones on a round earth:

In more recent times, we have pictures from space:

Aristotle and Bede mention the stars. Not only do the visible stars vary with latitude, but in the Northern Hemisphere they rotate around Polaris, while in the Southern Hemisphere they rotate around the South Celestial Pole, as in this photograph taken in Chile:

Sailors at sea have long known that the earth is round. From a vantage point 20 metres above sea level, one can see a complete ship 17 km away. Beyond that, the distant ship goes “hull down,” and only the upper parts of it are visible (from 34 km away, the lower 20 metres of a distant ship will be hidden). Closer to sea level, the distance is much less. This photo, taken in Spain by “Santifc,” shows the phenomenon (and similar observations can be made at some Australian beaches):

And, of course, the aircraft flight times to and from Australia can only be explained by the fact that the earth is round:


Democracy, Religion, and Same-Sex Marriage in Australia

The results of the postal survey are in, and Australia has voted 61.6% “Yes” to same-sex marriage. Or rather, it seems that two Australias voted. The official results have been made available by electorate, which means that they can be correlated with demographic factors (and my readers know that I love doing that). The average age of each electorate had no effect, but religious composition certainly did.

According to the 2016 census, Australia’s stated religious composition looks like this (where the 33.3% “Secular” includes Agnostic, Atheist, Humanist, New Age, and Unitarian Universalist):

The chart below shows a strong correlation (0.82) between the percentage of “Secular” people in an electorate, and the size of the “Yes” vote. If all the “Secular” people voted “Yes” (as seems likely), this means that 58% of the religious people voted “No.” Doing some simple multiple linear regression, there was a statistically significant link between religion and voting “No” for every major religious group. This link was strongest for Muslims, Hindus, Buddhists, Orthodox, the Uniting Church, and other non-Anglican Protestants. It was a little weaker for Anglicans and even more for Catholics, although the Anglican link was quite strong in Victoria, South Australia, New South Wales, and Queensland. The Catholic link was quite strong in the last three of those states.

Electorates in the chart are coloured according to the largest religious group within them. Sydney is 52.7% Secular, for example (as well as 8.6% Buddhist, 1.7% Muslim, 1.7% Hindu, 1% Jewish, 17.9% Catholic, 2.4% Orthodox, 13.5% Protestant, and 0.5% Other Religion). It voted 83.7% “Yes.”

Blaxland is 32.2% Muslim (as well as 9% Buddhist, 3.3% Hindu, 21.2% Catholic, 5.5% Orthodox, 13.2% Protestant, 0.7% Other Religion, and 14.9% Secular). It voted 73.9% “No.”

McMahon is 39% Catholic (as well as 5.9% Buddhist, 12.4% Muslim, 2.9% Hindu, 6.9% Orthodox, 18.5% Protestant, 1.4% Other Religion, and 13.2% Secular). It voted 64.9% “No.”

Barton is multi-religious with 28.1% Secular being the largest group (as well as 5.6% Buddhist, 8.4% Islam, 5.6% Hindu, 0.2% Jewish, 22.6% Catholic, 15.7% Orthodox, 13.3% Protestant, and 0.5% Other Religion). It voted 56.4% “No.”

It does seem that there is a secular Australia, which voted overwhelmingly “Yes,” and a religious Australia of twice the size, which voted mostly “No.” If the disparate religious communities in Australia realise that they have more in common than they have thought, that could have quite a significant influence on Australian politics in the future.


A (distorted) geographical view of the postal survey results


Travelling across Australia: Ten things to spot

On October 8, teams in the World Solar Challenge begin their race from Darwin to Adelaide. Here are 10 things for travellers across Australia to look out for.

1. The Magellanic Clouds

The Magellanic Clouds are two small galaxies – at 160,000 light-years and 200,000 light-years, the nearest visible galactic neighbours of our Milky Way. They can be seen in the Southern Hemisphere, away from towns. The Australian Outback is the perfect place to observe them.


The Magellanic Clouds (photo: ESO/S. Brunier)

2. The Southern Cross

The Southern Cross (Crux) is a constellation appearing on the flags of many countries in the Southern Hemisphere, including Australia. It consists of four bright stars, with a fifth being visible to the naked eye in good conditions. The constellation can be located with the aid of the pointer stars Alpha Centauri and Beta Centauri. It can also be used to determine the South Celestial Pole. The star at the “top” of the Cross (Gamma Crucis) is a red giant. The fifth star (Epsilon Crucis) is an orange giant.


The Southern Cross, pointers, and Magellanic Clouds (image: Michael Millthorn)

3. The wedge-tailed eagle

The wedge-tailed eagle (Aquila audax)) is Australia’s largest bird of prey, and a national icon. It can be seen around Australia, either in the sky, or snacking on roadkill.


Wedge-tailed eagle (photo: Fir0002/Flagstaffotos)

4. The red kangaroo

The red kangaroo (Macropus rufus) is the largest living marsupial, and is found throughout central Australia, in areas with less than 500 mm rainfall. It is an Australian national icon, as well as being a major traffic hazard at dawn and dusk.


Red kangaroos (photo: Jenny Smits)

5. The sand goanna

The sand goanna (Varanus gouldii) is a large monitor lizard, growing to about 1.5 metres. It is found across much of Australia.


Sand goanna (photo: Alan Couch)

6. The thorny devil

The thorny devil (Moloch horridus) is found in arid, sandy areas of western and central Australia. It lives mostly on ants.


The thorny devil (photo: Bäras)

7. Magnetic termites

Magnetic termites (Amitermes meridionalis) are one of two Australian termite species building mounds that align north–south. They can be found in the vicinity of Darwin. The mound orientation appears to be a temperature-control mechanism.


A magnetic termite mound (photo: brewbooks)

8. Sturt’s desert pea

Sturt’s desert pea (Swainsona formosa) grows in arid regions of Australia. It is the floral emblem of the state of South Australia.


Sturt’s desert pea (photo: Fir0002/Flagstaffotos)

9. The desert grasstree

The desert grasstree (Xanthorrhoea thorntonii) is a grasstree found in arid regions of western and central Australia. Like the other 27 species of grasstree (Xanthorrhoea spp.), it is endemic to Australia, and a symbol of the Australian landscape.


The desert grasstree (photo: Mark Marathon)

10. Opal

Opal is a gemstone form of hydrated silicon dioxide. The town of Coober Pedy in South Australia is a major source.


Opal from Coober Pedy (photo: Dpulitzer)


World Solar Challenge head to head: Australian Challengers

The World Solar Challenge is an exciting race to find the best solar car in the world. That makes for serious competition between countries. But there are also some interesting contests within countries. The most obvious is between Nuon (3) and Twente (21), who came first and second in the Challenger class last time.

Within Australia, Western Sydney (15, Unlimited 2.0, above) did very well in 2015, coming 10th in the Challenger class. Adelaide University (7, Lumen II, below) did not do quite so well back then (coming 21st), but have learned a lot about building solar cars from the experience. Potential competitors Clenergy Team Arrow (who came 8th in 2015) have switched to the Cruiser class, while newcomers ANU are still on their initial learning curve. Who will be Australia’s leading Challenger in 2017?